diff --git a/deltachat-rpc-client/pyproject.toml b/deltachat-rpc-client/pyproject.toml
index 8bde236a5..629ebb1ef 100644
--- a/deltachat-rpc-client/pyproject.toml
+++ b/deltachat-rpc-client/pyproject.toml
@@ -6,8 +6,7 @@ build-backend = "setuptools.build_meta"
 name = "deltachat-rpc-client"
 description = "Python client for Delta Chat core JSON-RPC interface"
 dependencies = [
-    "aiohttp",
-    "aiodns"
+    "aiohttp"
 ]
 classifiers = [
     "Development Status :: 5 - Production/Stable",
diff --git a/scripts/create-provider-data-rs.py b/scripts/create-provider-data-rs.py
index 824e3354d..100a34fe6 100755
--- a/scripts/create-provider-data-rs.py
+++ b/scripts/create-provider-data-rs.py
@@ -62,7 +62,7 @@ def process_opt(data):
 def process_config_defaults(data):
     if not "config_defaults" in data:
         return "None"
-    defaults = "Some(vec![\n"
+    defaults = "Some(&[\n"
     config_defaults = data.get("config_defaults", "")
     for key in config_defaults:
         value = str(config_defaults[key])
@@ -162,7 +162,7 @@ def process_data(data, file):
         provider += '    before_login_hint: "' + before_login_hint + '",\n'
         provider += '    after_login_hint: "' + after_login_hint + '",\n'
         provider += '    overview_page: "' + file2url(file) + '",\n'
-        provider += "    server: vec![\n" + server + "    ],\n"
+        provider += "    server: &[\n" + server + "    ],\n"
         provider += "    opt: " + opt + ",\n"
         provider += "    config_defaults: " + config_defaults + ",\n"
         provider += "    oauth2_authorizer: " + oauth2 + ",\n"
diff --git a/src/chat.rs b/src/chat.rs
index ef30b7393..1369d840c 100644
--- a/src/chat.rs
+++ b/src/chat.rs
@@ -1326,11 +1326,11 @@ impl Chat {
     pub async fn get_profile_image(&self, context: &Context) -> Result<Option<PathBuf>> {
         if let Some(image_rel) = self.param.get(Param::ProfileImage) {
             if !image_rel.is_empty() {
-                return Ok(Some(get_abs_path(context, image_rel)));
+                return Ok(Some(get_abs_path(context, Path::new(&image_rel))));
             }
         } else if self.id.is_archived_link() {
             if let Ok(image_rel) = get_archive_icon(context).await {
-                return Ok(Some(get_abs_path(context, image_rel)));
+                return Ok(Some(get_abs_path(context, Path::new(&image_rel))));
             }
         } else if self.typ == Chattype::Single {
             let contacts = get_chat_contacts(context, self.id).await?;
@@ -1341,7 +1341,7 @@ impl Chat {
             }
         } else if self.typ == Chattype::Broadcast {
             if let Ok(image_rel) = get_broadcast_icon(context).await {
-                return Ok(Some(get_abs_path(context, image_rel)));
+                return Ok(Some(get_abs_path(context, Path::new(&image_rel))));
             }
         }
         Ok(None)
diff --git a/src/config.rs b/src/config.rs
index 2e243ba53..65c1a20c0 100644
--- a/src/config.rs
+++ b/src/config.rs
@@ -1,6 +1,7 @@
 //! # Key-value configuration management.
 
 use std::env;
+use std::path::Path;
 use std::str::FromStr;
 
 use anyhow::{ensure, Context as _, Result};
@@ -339,7 +340,11 @@ impl Context {
         let value = match key {
             Config::Selfavatar => {
                 let rel_path = self.sql.get_raw_config(key.as_ref()).await?;
-                rel_path.map(|p| get_abs_path(self, p).to_string_lossy().into_owned())
+                rel_path.map(|p| {
+                    get_abs_path(self, Path::new(&p))
+                        .to_string_lossy()
+                        .into_owned()
+                })
             }
             Config::SysVersion => Some((*DC_VERSION_STR).clone()),
             Config::SysMsgsizeMaxRecommended => Some(format!("{RECOMMENDED_FILE_SIZE}")),
diff --git a/src/configure.rs b/src/configure.rs
index bb63c83d9..378268800 100644
--- a/src/configure.rs
+++ b/src/configure.rs
@@ -130,7 +130,7 @@ async fn on_configure_completed(
     old_addr: Option<String>,
 ) -> Result<()> {
     if let Some(provider) = param.provider {
-        if let Some(config_defaults) = &provider.config_defaults {
+        if let Some(config_defaults) = provider.config_defaults {
             for def in config_defaults {
                 if !context.config_exists(def.key).await? {
                     info!(context, "apply config_defaults {}={}", def.key, def.value);
diff --git a/src/contact.rs b/src/contact.rs
index 2998ae1ad..a5f172a9b 100644
--- a/src/contact.rs
+++ b/src/contact.rs
@@ -5,7 +5,7 @@ use std::collections::BinaryHeap;
 use std::convert::{TryFrom, TryInto};
 use std::fmt;
 use std::ops::Deref;
-use std::path::PathBuf;
+use std::path::{Path, PathBuf};
 use std::time::{SystemTime, UNIX_EPOCH};
 
 use anyhow::{bail, ensure, Context as _, Result};
@@ -1186,7 +1186,7 @@ impl Contact {
             }
         } else if let Some(image_rel) = self.param.get(Param::ProfileImage) {
             if !image_rel.is_empty() {
-                return Ok(Some(get_abs_path(context, image_rel)));
+                return Ok(Some(get_abs_path(context, Path::new(image_rel))));
             }
         }
         Ok(None)
diff --git a/src/provider.rs b/src/provider.rs
index 8035acd88..1df329c1d 100644
--- a/src/provider.rs
+++ b/src/provider.rs
@@ -123,10 +123,10 @@ pub struct Provider {
     pub overview_page: &'static str,
 
     /// List of provider servers.
-    pub server: Vec<Server>,
+    pub server: &'static [Server],
 
     /// Default configuration values to set when provider is configured.
-    pub config_defaults: Option<Vec<ConfigDefault>>,
+    pub config_defaults: Option<&'static [ConfigDefault]>,
 
     /// Type of OAuth 2 authorization if provider supports it.
     pub oauth2_authorizer: Option<Oauth2Authorizer>,
diff --git a/src/provider/data.rs b/src/provider/data.rs
index 32b1ff465..fedd5630f 100644
--- a/src/provider/data.rs
+++ b/src/provider/data.rs
@@ -17,7 +17,7 @@ static P_163: Lazy<Provider> = Lazy::new(|| Provider {
     before_login_hint: "",
     after_login_hint: "",
     overview_page: "https://providers.delta.chat/163",
-    server: vec![
+    server: &[
         Server {
             protocol: Imap,
             socket: Ssl,
@@ -45,7 +45,7 @@ static P_AKTIVIX_ORG: Lazy<Provider> = Lazy::new(|| Provider {
     before_login_hint: "",
     after_login_hint: "",
     overview_page: "https://providers.delta.chat/aktivix-org",
-    server: vec![
+    server: &[
         Server {
             protocol: Imap,
             socket: Starttls,
@@ -74,7 +74,7 @@ static P_AOL: Lazy<Provider> = Lazy::new(|| {
     before_login_hint: "To log in to AOL with Delta Chat, you need to set up an app password in the AOL web interface.",
     after_login_hint: "",
     overview_page: "https://providers.delta.chat/aol",
-    server: vec![
+    server: &[
         Server { protocol: Imap, socket: Ssl, hostname: "imap.aol.com", port: 993, username_pattern: Email },
         Server { protocol: Smtp, socket: Ssl, hostname: "smtp.aol.com", port: 465, username_pattern: Email },
     ],
@@ -91,7 +91,7 @@ static P_ARCOR_DE: Lazy<Provider> = Lazy::new(|| Provider {
     before_login_hint: "",
     after_login_hint: "",
     overview_page: "https://providers.delta.chat/arcor-de",
-    server: vec![
+    server: &[
         Server {
             protocol: Imap,
             socket: Ssl,
@@ -119,7 +119,7 @@ static P_AUTISTICI_ORG: Lazy<Provider> = Lazy::new(|| Provider {
     before_login_hint: "",
     after_login_hint: "",
     overview_page: "https://providers.delta.chat/autistici-org",
-    server: vec![
+    server: &[
         Server {
             protocol: Imap,
             socket: Ssl,
@@ -147,7 +147,7 @@ static P_BLINDZELN_ORG: Lazy<Provider> = Lazy::new(|| Provider {
     before_login_hint: "",
     after_login_hint: "",
     overview_page: "https://providers.delta.chat/blindzeln-org",
-    server: vec![
+    server: &[
         Server {
             protocol: Imap,
             socket: Ssl,
@@ -175,7 +175,7 @@ static P_BLUEWIN_CH: Lazy<Provider> = Lazy::new(|| Provider {
     before_login_hint: "",
     after_login_hint: "",
     overview_page: "https://providers.delta.chat/bluewin-ch",
-    server: vec![
+    server: &[
         Server {
             protocol: Imap,
             socket: Ssl,
@@ -203,7 +203,7 @@ static P_BUZON_UY: Lazy<Provider> = Lazy::new(|| Provider {
     before_login_hint: "",
     after_login_hint: "",
     overview_page: "https://providers.delta.chat/buzon-uy",
-    server: vec![
+    server: &[
         Server {
             protocol: Imap,
             socket: Starttls,
@@ -231,7 +231,7 @@ static P_CHELLO_AT: Lazy<Provider> = Lazy::new(|| Provider {
     before_login_hint: "",
     after_login_hint: "",
     overview_page: "https://providers.delta.chat/chello-at",
-    server: vec![
+    server: &[
         Server {
             protocol: Imap,
             socket: Ssl,
@@ -259,7 +259,7 @@ static P_COMCAST: Lazy<Provider> = Lazy::new(|| Provider {
     before_login_hint: "",
     after_login_hint: "",
     overview_page: "https://providers.delta.chat/comcast",
-    server: vec![],
+    server: &[],
     opt: Default::default(),
     config_defaults: None,
     oauth2_authorizer: None,
@@ -272,7 +272,7 @@ static P_DISMAIL_DE: Lazy<Provider> = Lazy::new(|| Provider {
     before_login_hint: "",
     after_login_hint: "",
     overview_page: "https://providers.delta.chat/dismail-de",
-    server: vec![],
+    server: &[],
     opt: Default::default(),
     config_defaults: None,
     oauth2_authorizer: None,
@@ -285,7 +285,7 @@ static P_DISROOT: Lazy<Provider> = Lazy::new(|| Provider {
     before_login_hint: "",
     after_login_hint: "",
     overview_page: "https://providers.delta.chat/disroot",
-    server: vec![
+    server: &[
         Server {
             protocol: Imap,
             socket: Ssl,
@@ -313,7 +313,7 @@ static P_E_EMAIL: Lazy<Provider> = Lazy::new(|| Provider {
     before_login_hint: "",
     after_login_hint: "",
     overview_page: "https://providers.delta.chat/e-email",
-    server: vec![
+    server: &[
         Server {
             protocol: Imap,
             socket: Ssl,
@@ -341,7 +341,7 @@ static P_ESPIV_NET: Lazy<Provider> = Lazy::new(|| Provider {
     before_login_hint: "",
     after_login_hint: "",
     overview_page: "https://providers.delta.chat/espiv-net",
-    server: vec![],
+    server: &[],
     opt: Default::default(),
     config_defaults: None,
     oauth2_authorizer: None,
@@ -355,7 +355,7 @@ static P_EXAMPLE_COM: Lazy<Provider> = Lazy::new(|| {
     before_login_hint: "Hush this provider doesn't exist!",
     after_login_hint: "This provider doesn't really exist, so you can't use it :/ If you need an email provider for Delta Chat, take a look at providers.delta.chat!",
     overview_page: "https://providers.delta.chat/example-com",
-    server: vec![
+    server: &[
         Server { protocol: Imap, socket: Ssl, hostname: "imap.example.com", port: 1337, username_pattern: Email },
         Server { protocol: Smtp, socket: Starttls, hostname: "smtp.example.com", port: 1337, username_pattern: Email },
     ],
@@ -373,7 +373,7 @@ static P_FASTMAIL: Lazy<Provider> = Lazy::new(|| Provider {
         "You must create an app-specific password for Delta Chat before you can log in.",
     after_login_hint: "",
     overview_page: "https://providers.delta.chat/fastmail",
-    server: vec![
+    server: &[
         Server {
             protocol: Imap,
             socket: Ssl,
@@ -402,7 +402,7 @@ static P_FIREMAIL_DE: Lazy<Provider> = Lazy::new(|| {
     before_login_hint: "Firemail erlaubt nur bei bezahlten Accounts den vollen Zugriff auf das E-Mail-Protokoll. Wenn Sie nicht für Firemail bezahlen, verwenden Sie bitte einen anderen E-Mail-Anbieter.",
     after_login_hint: "Leider schränkt Firemail die maximale Gruppengröße ein. Je nach Bezahlmodell sind nur 5 bis 30 Gruppenmitglieder erlaubt.",
     overview_page: "https://providers.delta.chat/firemail-de",
-    server: vec![
+    server: &[
     ],
     opt: Default::default(),
     config_defaults: None,
@@ -417,9 +417,9 @@ static P_FIVE_CHAT: Lazy<Provider> = Lazy::new(|| Provider {
     before_login_hint: "",
     after_login_hint: "",
     overview_page: "https://providers.delta.chat/five-chat",
-    server: vec![],
+    server: &[],
     opt: Default::default(),
-    config_defaults: Some(vec![
+    config_defaults: Some(&[
         ConfigDefault {
             key: Config::BccSelf,
             value: "1",
@@ -444,7 +444,7 @@ static P_FREENET_DE: Lazy<Provider> = Lazy::new(|| {
     before_login_hint: "Um deine freenet.de E-Mail-Adresse mit Delta Chat zu benutzen, musst du erst auf der freenet.de-Webseite \"POP3/IMAP/SMTP\" aktivieren.",
     after_login_hint: "",
     overview_page: "https://providers.delta.chat/freenet-de",
-    server: vec![
+    server: &[
         Server { protocol: Imap, socket: Ssl, hostname: "mx.freenet.de", port: 993, username_pattern: Email },
         Server { protocol: Smtp, socket: Starttls, hostname: "mx.freenet.de", port: 587, username_pattern: Email },
     ],
@@ -462,7 +462,7 @@ static P_GMAIL: Lazy<Provider> = Lazy::new(|| {
     before_login_hint: "For Gmail accounts, you need to create an app-password if you have \"2-Step Verification\" enabled. If this setting is not available, you need to enable \"less secure apps\".",
     after_login_hint: "",
     overview_page: "https://providers.delta.chat/gmail",
-    server: vec![
+    server: &[
         Server { protocol: Imap, socket: Ssl, hostname: "imap.gmail.com", port: 993, username_pattern: Email },
         Server { protocol: Smtp, socket: Ssl, hostname: "smtp.gmail.com", port: 465, username_pattern: Email },
     ],
@@ -482,7 +482,7 @@ static P_GMX_NET: Lazy<Provider> = Lazy::new(|| Provider {
     before_login_hint: "You must allow IMAP access to your account before you can login.",
     after_login_hint: "",
     overview_page: "https://providers.delta.chat/gmx-net",
-    server: vec![
+    server: &[
         Server {
             protocol: Imap,
             socket: Ssl,
@@ -517,12 +517,12 @@ static P_HERMES_RADIO: Lazy<Provider> = Lazy::new(|| Provider {
     before_login_hint: "",
     after_login_hint: "",
     overview_page: "https://providers.delta.chat/hermes-radio",
-    server: vec![],
+    server: &[],
     opt: ProviderOptions {
         strict_tls: false,
         ..Default::default()
     },
-    config_defaults: Some(vec![
+    config_defaults: Some(&[
         ConfigDefault {
             key: Config::MdnsEnabled,
             value: "0",
@@ -547,7 +547,7 @@ static P_HEY_COM: Lazy<Provider> = Lazy::new(|| {
     before_login_hint: "hey.com does not offer the standard IMAP e-mail protocol, so you cannot log in with Delta Chat to hey.com.",
     after_login_hint: "",
     overview_page: "https://providers.delta.chat/hey-com",
-    server: vec![
+    server: &[
     ],
     opt: Default::default(),
     config_defaults: None,
@@ -562,7 +562,7 @@ static P_I_UA: Lazy<Provider> = Lazy::new(|| Provider {
     before_login_hint: "Протокол IMAP не предоставляется и не планируется.",
     after_login_hint: "",
     overview_page: "https://providers.delta.chat/i-ua",
-    server: vec![],
+    server: &[],
     opt: Default::default(),
     config_defaults: None,
     oauth2_authorizer: None,
@@ -575,7 +575,7 @@ static P_I3_NET: Lazy<Provider> = Lazy::new(|| Provider {
     before_login_hint: "",
     after_login_hint: "",
     overview_page: "https://providers.delta.chat/i3-net",
-    server: vec![],
+    server: &[],
     opt: Default::default(),
     config_defaults: None,
     oauth2_authorizer: None,
@@ -588,7 +588,7 @@ static P_ICLOUD: Lazy<Provider> = Lazy::new(|| Provider {
     before_login_hint: "You must create an app-specific password for Delta Chat before login.",
     after_login_hint: "",
     overview_page: "https://providers.delta.chat/icloud",
-    server: vec![
+    server: &[
         Server {
             protocol: Imap,
             socket: Ssl,
@@ -616,7 +616,7 @@ static P_INFOMANIAK_COM: Lazy<Provider> = Lazy::new(|| Provider {
     before_login_hint: "",
     after_login_hint: "",
     overview_page: "https://providers.delta.chat/infomaniak-com",
-    server: vec![
+    server: &[
         Server {
             protocol: Imap,
             socket: Ssl,
@@ -647,7 +647,7 @@ static P_KOLST_COM: Lazy<Provider> = Lazy::new(|| Provider {
     before_login_hint: "",
     after_login_hint: "",
     overview_page: "https://providers.delta.chat/kolst-com",
-    server: vec![],
+    server: &[],
     opt: Default::default(),
     config_defaults: None,
     oauth2_authorizer: None,
@@ -660,7 +660,7 @@ static P_KONTENT_COM: Lazy<Provider> = Lazy::new(|| Provider {
     before_login_hint: "",
     after_login_hint: "",
     overview_page: "https://providers.delta.chat/kontent-com",
-    server: vec![],
+    server: &[],
     opt: Default::default(),
     config_defaults: None,
     oauth2_authorizer: None,
@@ -673,7 +673,7 @@ static P_MAIL_DE: Lazy<Provider> = Lazy::new(|| Provider {
     before_login_hint: "",
     after_login_hint: "",
     overview_page: "https://providers.delta.chat/mail-de",
-    server: vec![
+    server: &[
         Server {
             protocol: Imap,
             socket: Ssl,
@@ -702,7 +702,7 @@ static P_MAIL_RU: Lazy<Provider> = Lazy::new(|| {
     before_login_hint: "Вам необходимо сгенерировать \"пароль для внешнего приложения\" в веб-интерфейсе mail.ru, чтобы mail.ru работал с Delta Chat.",
     after_login_hint: "",
     overview_page: "https://providers.delta.chat/mail-ru",
-    server: vec![
+    server: &[
         Server { protocol: Imap, socket: Ssl, hostname: "imap.mail.ru", port: 993, username_pattern: Email },
         Server { protocol: Smtp, socket: Ssl, hostname: "smtp.mail.ru", port: 465, username_pattern: Email },
     ],
@@ -719,7 +719,7 @@ static P_MAIL2TOR: Lazy<Provider> = Lazy::new(|| Provider {
     before_login_hint: "Tor is needed to connect to the email servers.",
     after_login_hint: "",
     overview_page: "https://providers.delta.chat/mail2tor",
-    server: vec![
+    server: &[
         Server {
             protocol: Imap,
             socket: Plain,
@@ -747,7 +747,7 @@ static P_MAILBOX_ORG: Lazy<Provider> = Lazy::new(|| Provider {
     before_login_hint: "",
     after_login_hint: "",
     overview_page: "https://providers.delta.chat/mailbox-org",
-    server: vec![
+    server: &[
         Server {
             protocol: Imap,
             socket: Ssl,
@@ -775,7 +775,7 @@ static P_MAILO_COM: Lazy<Provider> = Lazy::new(|| Provider {
     before_login_hint: "",
     after_login_hint: "",
     overview_page: "https://providers.delta.chat/mailo-com",
-    server: vec![
+    server: &[
         Server {
             protocol: Imap,
             socket: Ssl,
@@ -803,7 +803,7 @@ static P_NAUTA_CU: Lazy<Provider> = Lazy::new(|| Provider {
     before_login_hint: "",
     after_login_hint: "",
     overview_page: "https://providers.delta.chat/nauta-cu",
-    server: vec![
+    server: &[
         Server {
             protocol: Imap,
             socket: Starttls,
@@ -824,7 +824,7 @@ static P_NAUTA_CU: Lazy<Provider> = Lazy::new(|| Provider {
         strict_tls: false,
         ..Default::default()
     },
-    config_defaults: Some(vec![
+    config_defaults: Some(&[
         ConfigDefault {
             key: Config::DeleteServerAfter,
             value: "1",
@@ -860,7 +860,7 @@ static P_NAVER: Lazy<Provider> = Lazy::new(|| Provider {
     before_login_hint: "Manually enabling IMAP/SMTP is required.",
     after_login_hint: "",
     overview_page: "https://providers.delta.chat/naver",
-    server: vec![
+    server: &[
         Server {
             protocol: Imap,
             socket: Ssl,
@@ -888,7 +888,7 @@ static P_NUBO_COOP: Lazy<Provider> = Lazy::new(|| Provider {
     before_login_hint: "",
     after_login_hint: "",
     overview_page: "https://providers.delta.chat/nubo-coop",
-    server: vec![
+    server: &[
         Server {
             protocol: Imap,
             socket: Ssl,
@@ -916,7 +916,7 @@ static P_OUTLOOK_COM: Lazy<Provider> = Lazy::new(|| Provider {
     before_login_hint: "",
     after_login_hint: "",
     overview_page: "https://providers.delta.chat/outlook-com",
-    server: vec![
+    server: &[
         Server {
             protocol: Imap,
             socket: Ssl,
@@ -944,7 +944,7 @@ static P_OUVATON_COOP: Lazy<Provider> = Lazy::new(|| Provider {
     before_login_hint: "",
     after_login_hint: "",
     overview_page: "https://providers.delta.chat/ouvaton-coop",
-    server: vec![
+    server: &[
         Server {
             protocol: Imap,
             socket: Ssl,
@@ -972,7 +972,7 @@ static P_POSTEO: Lazy<Provider> = Lazy::new(|| Provider {
     before_login_hint: "",
     after_login_hint: "",
     overview_page: "https://providers.delta.chat/posteo",
-    server: vec![
+    server: &[
         Server {
             protocol: Imap,
             socket: Ssl,
@@ -1015,7 +1015,7 @@ static P_PROTONMAIL: Lazy<Provider> = Lazy::new(|| {
     before_login_hint: "Protonmail does not offer the standard IMAP e-mail protocol, so you cannot log in with Delta Chat to Protonmail.",
     after_login_hint: "To use Delta Chat with Protonmail, the IMAP bridge must be running in the background. If you have connectivity issues, double check whether it works as expected.",
     overview_page: "https://providers.delta.chat/protonmail",
-    server: vec![
+    server: &[
     ],
     opt: Default::default(),
     config_defaults: None,
@@ -1031,7 +1031,7 @@ static P_QQ: Lazy<Provider> = Lazy::new(|| {
     before_login_hint: "Manually enabling IMAP/SMTP and creating an app-specific password for Delta Chat are required.",
     after_login_hint: "",
     overview_page: "https://providers.delta.chat/qq",
-    server: vec![
+    server: &[
         Server { protocol: Imap, socket: Ssl, hostname: "imap.qq.com", port: 993, username_pattern: Emaillocalpart },
         Server { protocol: Smtp, socket: Ssl, hostname: "smtp.qq.com", port: 465, username_pattern: Email },
     ],
@@ -1048,7 +1048,7 @@ static P_RISEUP_NET: Lazy<Provider> = Lazy::new(|| Provider {
     before_login_hint: "",
     after_login_hint: "",
     overview_page: "https://providers.delta.chat/riseup-net",
-    server: vec![
+    server: &[
         Server {
             protocol: Imap,
             socket: Ssl,
@@ -1076,7 +1076,7 @@ static P_ROGERS_COM: Lazy<Provider> = Lazy::new(|| Provider {
     before_login_hint: "",
     after_login_hint: "",
     overview_page: "https://providers.delta.chat/rogers-com",
-    server: vec![],
+    server: &[],
     opt: Default::default(),
     config_defaults: None,
     oauth2_authorizer: None,
@@ -1089,7 +1089,7 @@ static P_SONIC: Lazy<Provider> = Lazy::new(|| Provider {
     before_login_hint: "",
     after_login_hint: "",
     overview_page: "https://providers.delta.chat/sonic",
-    server: vec![],
+    server: &[],
     opt: Default::default(),
     config_defaults: None,
     oauth2_authorizer: None,
@@ -1102,7 +1102,7 @@ static P_SYSTEMAUSFALL_ORG: Lazy<Provider> = Lazy::new(|| Provider {
     before_login_hint: "",
     after_login_hint: "",
     overview_page: "https://providers.delta.chat/systemausfall-org",
-    server: vec![
+    server: &[
         Server {
             protocol: Imap,
             socket: Ssl,
@@ -1130,7 +1130,7 @@ static P_SYSTEMLI_ORG: Lazy<Provider> = Lazy::new(|| Provider {
     before_login_hint: "",
     after_login_hint: "",
     overview_page: "https://providers.delta.chat/systemli-org",
-    server: vec![
+    server: &[
         Server {
             protocol: Imap,
             socket: Ssl,
@@ -1159,7 +1159,7 @@ static P_T_ONLINE: Lazy<Provider> = Lazy::new(|| {
     before_login_hint: "To use Delta Chat with a T-Online email address, you need to create an app password in the web interface.",
     after_login_hint: "",
     overview_page: "https://providers.delta.chat/t-online",
-    server: vec![
+    server: &[
         Server { protocol: Imap, socket: Ssl, hostname: "secureimap.t-online.de", port: 993, username_pattern: Email },
         Server { protocol: Smtp, socket: Ssl, hostname: "securesmtp.t-online.de", port: 465, username_pattern: Email },
     ],
@@ -1176,7 +1176,7 @@ static P_TESTRUN: Lazy<Provider> = Lazy::new(|| Provider {
     before_login_hint: "",
     after_login_hint: "",
     overview_page: "https://providers.delta.chat/testrun",
-    server: vec![
+    server: &[
         Server {
             protocol: Imap,
             socket: Ssl,
@@ -1200,7 +1200,7 @@ static P_TESTRUN: Lazy<Provider> = Lazy::new(|| Provider {
         },
     ],
     opt: Default::default(),
-    config_defaults: Some(vec![
+    config_defaults: Some(&[
         ConfigDefault {
             key: Config::BccSelf,
             value: "1",
@@ -1224,7 +1224,7 @@ static P_TISCALI_IT: Lazy<Provider> = Lazy::new(|| Provider {
     before_login_hint: "",
     after_login_hint: "",
     overview_page: "https://providers.delta.chat/tiscali-it",
-    server: vec![
+    server: &[
         Server {
             protocol: Imap,
             socket: Ssl,
@@ -1253,7 +1253,7 @@ static P_TUTANOTA: Lazy<Provider> = Lazy::new(|| {
     before_login_hint: "Tutanota does not offer the standard IMAP e-mail protocol, so you cannot log in with Delta Chat to Tutanota.",
     after_login_hint: "",
     overview_page: "https://providers.delta.chat/tutanota",
-    server: vec![
+    server: &[
     ],
     opt: Default::default(),
     config_defaults: None,
@@ -1268,7 +1268,7 @@ static P_UKR_NET: Lazy<Provider> = Lazy::new(|| Provider {
     before_login_hint: "",
     after_login_hint: "",
     overview_page: "https://providers.delta.chat/ukr-net",
-    server: vec![],
+    server: &[],
     opt: Default::default(),
     config_defaults: None,
     oauth2_authorizer: None,
@@ -1281,7 +1281,7 @@ static P_UNDERNET_UY: Lazy<Provider> = Lazy::new(|| Provider {
     before_login_hint: "",
     after_login_hint: "",
     overview_page: "https://providers.delta.chat/undernet-uy",
-    server: vec![
+    server: &[
         Server {
             protocol: Imap,
             socket: Starttls,
@@ -1309,7 +1309,7 @@ static P_VFEMAIL: Lazy<Provider> = Lazy::new(|| Provider {
     before_login_hint: "",
     after_login_hint: "",
     overview_page: "https://providers.delta.chat/vfemail",
-    server: vec![],
+    server: &[],
     opt: Default::default(),
     config_defaults: None,
     oauth2_authorizer: None,
@@ -1322,7 +1322,7 @@ static P_VIVALDI: Lazy<Provider> = Lazy::new(|| Provider {
     before_login_hint: "",
     after_login_hint: "",
     overview_page: "https://providers.delta.chat/vivaldi",
-    server: vec![
+    server: &[
         Server {
             protocol: Imap,
             socket: Starttls,
@@ -1350,7 +1350,7 @@ static P_VODAFONE_DE: Lazy<Provider> = Lazy::new(|| Provider {
     before_login_hint: "",
     after_login_hint: "",
     overview_page: "https://providers.delta.chat/vodafone-de",
-    server: vec![
+    server: &[
         Server {
             protocol: Imap,
             socket: Ssl,
@@ -1379,7 +1379,7 @@ static P_WEB_DE: Lazy<Provider> = Lazy::new(|| {
     before_login_hint: "You must allow IMAP access to your account before you can login.",
     after_login_hint: "Note: if you have your web.de spam settings too strict, you won't receive contact requests from new people. If you want to receive contact requests, you should disable the \"3-Wege-Spamschutz\" in the web.de settings.  Read how: https://hilfe.web.de/email/spam-und-viren/spamschutz-einstellungen.html",
     overview_page: "https://providers.delta.chat/web-de",
-    server: vec![
+    server: &[
         Server { protocol: Imap, socket: Ssl, hostname: "imap.web.de", port: 993, username_pattern: Emaillocalpart },
         Server { protocol: Imap, socket: Starttls, hostname: "imap.web.de", port: 143, username_pattern: Emaillocalpart },
         Server { protocol: Smtp, socket: Starttls, hostname: "smtp.web.de", port: 587, username_pattern: Emaillocalpart },
@@ -1398,7 +1398,7 @@ static P_YAHOO: Lazy<Provider> = Lazy::new(|| {
     before_login_hint: "To use Delta Chat with your Yahoo email address you have to create an \"App-Password\" in the account security screen.",
     after_login_hint: "",
     overview_page: "https://providers.delta.chat/yahoo",
-    server: vec![
+    server: &[
         Server { protocol: Imap, socket: Ssl, hostname: "imap.mail.yahoo.com", port: 993, username_pattern: Email },
         Server { protocol: Smtp, socket: Ssl, hostname: "smtp.mail.yahoo.com", port: 465, username_pattern: Email },
     ],
@@ -1415,7 +1415,7 @@ static P_YANDEX_RU: Lazy<Provider> = Lazy::new(|| Provider {
     before_login_hint: "For Yandex accounts, you have to set IMAP protocol option turned on.",
     after_login_hint: "",
     overview_page: "https://providers.delta.chat/yandex-ru",
-    server: vec![
+    server: &[
         Server {
             protocol: Imap,
             socket: Ssl,
@@ -1444,12 +1444,12 @@ static P_YGGMAIL: Lazy<Provider> = Lazy::new(|| {
     before_login_hint: "An Yggmail companion app needs to be installed on your device to access the Yggmail network.",
     after_login_hint: "Make sure, the Yggmail companion app runs whenever you want to use this account. Note, that you usually cannot write from @yggmail addresses to normal e-mail-addresses (as @gmx.net). However, you can create another account in the normal e-mail-network for this purpose.",
     overview_page: "https://providers.delta.chat/yggmail",
-    server: vec![
+    server: &[
         Server { protocol: Imap, socket: Plain, hostname: "localhost", port: 1143, username_pattern: Email },
         Server { protocol: Smtp, socket: Plain, hostname: "localhost", port: 1025, username_pattern: Email },
     ],
     opt: Default::default(),
-    config_defaults: Some(vec![
+    config_defaults: Some(&[
         ConfigDefault { key: Config::MvboxMove, value: "0" },
     ]),
     oauth2_authorizer: None,
@@ -1463,7 +1463,7 @@ static P_ZIGGO_NL: Lazy<Provider> = Lazy::new(|| Provider {
     before_login_hint: "",
     after_login_hint: "",
     overview_page: "https://providers.delta.chat/ziggo-nl",
-    server: vec![
+    server: &[
         Server {
             protocol: Imap,
             socket: Ssl,
@@ -1491,7 +1491,7 @@ static P_ZOHO: Lazy<Provider> = Lazy::new(|| Provider {
     before_login_hint: "To use Zoho Mail, you have to turn on IMAP in the Zoho Mail backend.",
     after_login_hint: "",
     overview_page: "https://providers.delta.chat/zoho",
-    server: vec![
+    server: &[
         Server {
             protocol: Imap,
             socket: Ssl,
diff --git a/src/tools.rs b/src/tools.rs
index b0ba5d6f7..18754a835 100644
--- a/src/tools.rs
+++ b/src/tools.rs
@@ -323,17 +323,16 @@ pub fn get_filemeta(buf: &[u8]) -> Result<(u32, u32)> {
 ///
 /// If `path` starts with "$BLOBDIR", replaces it with the blobdir path.
 /// Otherwise, returns path as is.
-pub(crate) fn get_abs_path(context: &Context, path: impl AsRef<Path>) -> PathBuf {
-    let p: &Path = path.as_ref();
-    if let Ok(p) = p.strip_prefix("$BLOBDIR") {
+pub(crate) fn get_abs_path(context: &Context, path: &Path) -> PathBuf {
+    if let Ok(p) = path.strip_prefix("$BLOBDIR") {
         context.get_blobdir().join(p)
     } else {
-        p.into()
+        path.into()
     }
 }
 
 pub(crate) async fn get_filebytes(context: &Context, path: impl AsRef<Path>) -> Result<u64> {
-    let path_abs = get_abs_path(context, &path);
+    let path_abs = get_abs_path(context, path.as_ref());
     let meta = fs::metadata(&path_abs).await?;
     Ok(meta.len())
 }
@@ -377,7 +376,7 @@ pub(crate) async fn create_folder(
     context: &Context,
     path: impl AsRef<Path>,
 ) -> Result<(), io::Error> {
-    let path_abs = get_abs_path(context, &path);
+    let path_abs = get_abs_path(context, path.as_ref());
     if !path_abs.exists() {
         match fs::create_dir_all(path_abs).await {
             Ok(_) => Ok(()),
@@ -402,7 +401,7 @@ pub(crate) async fn write_file(
     path: impl AsRef<Path>,
     buf: &[u8],
 ) -> Result<(), io::Error> {
-    let path_abs = get_abs_path(context, &path);
+    let path_abs = get_abs_path(context, path.as_ref());
     fs::write(&path_abs, buf).await.map_err(|err| {
         warn!(
             context,
@@ -417,7 +416,7 @@ pub(crate) async fn write_file(
 
 /// Reads the file and returns its context as a byte vector.
 pub async fn read_file(context: &Context, path: impl AsRef<Path>) -> Result<Vec<u8>> {
-    let path_abs = get_abs_path(context, &path);
+    let path_abs = get_abs_path(context, path.as_ref());
 
     match fs::read(&path_abs).await {
         Ok(bytes) => Ok(bytes),
@@ -434,7 +433,7 @@ pub async fn read_file(context: &Context, path: impl AsRef<Path>) -> Result<Vec<
 }
 
 pub async fn open_file(context: &Context, path: impl AsRef<Path>) -> Result<fs::File> {
-    let path_abs = get_abs_path(context, &path);
+    let path_abs = get_abs_path(context, path.as_ref());
 
     match fs::File::open(&path_abs).await {
         Ok(bytes) => Ok(bytes),
@@ -450,12 +449,8 @@ pub async fn open_file(context: &Context, path: impl AsRef<Path>) -> Result<fs::
     }
 }
 
-pub fn open_file_std<P: AsRef<std::path::Path>>(
-    context: &Context,
-    path: P,
-) -> Result<std::fs::File> {
-    let p: PathBuf = path.as_ref().into();
-    let path_abs = get_abs_path(context, p);
+pub fn open_file_std(context: &Context, path: impl AsRef<Path>) -> Result<std::fs::File> {
+    let path_abs = get_abs_path(context, path.as_ref());
 
     match std::fs::File::open(path_abs) {
         Ok(bytes) => Ok(bytes),