api: Add list_transports_ex() and set_transport_unpublished() functions

deltachat-ffi/deltachat.h

@@ -6784,8 +6784,8 @@ void dc_event_unref(dc_event_t* event);
  * UI should update the list.
  *
  * The event is emitted when the transports are modified on another device
- * using the JSON-RPC calls `add_or_update_transport`, `add_transport_from_qr`, `delete_transport`
- * or `set_config(configured_addr)`.
+ * using the JSON-RPC calls `add_or_update_transport`, `add_transport_from_qr`, `delete_transport`,
+ * `set_transport_unpublished` or `set_config(configured_addr)`.
  */
 #define DC_EVENT_TRANSPORTS_MODIFIED           2600
 

deltachat-jsonrpc/src/api.rs

@@ -68,6 +68,7 @@ use self::types::{
     },
 };
 use crate::api::types::chat_list::{get_chat_list_item_by_id, ChatListItemFetchResult};
+use crate::api::types::login_param::Transport;
 use crate::api::types::qr::{QrObject, SecurejoinSource, SecurejoinUiPath};
 
 #[derive(Debug)]
@@ -528,6 +529,7 @@ impl CommandApi {
     ///   from a server encoded in a QR code.
     /// - [Self::list_transports()] to get a list of all configured transports.
     /// - [Self::delete_transport()] to remove a transport.
+    /// - [Self::set_transport_unpublished()] to set whether contacts see this transport.
     async fn add_or_update_transport(
         &self,
         account_id: u32,
@@ -553,7 +555,23 @@ impl CommandApi {
     /// Returns the list of all email accounts that are used as a transport in the current profile.
     /// Use [Self::add_or_update_transport()] to add or change a transport
     /// and [Self::delete_transport()] to delete a transport.
+    /// Use [Self::list_transports_ex()] to additionally query
+    /// whether the transports are marked as 'unpublished'.
     async fn list_transports(&self, account_id: u32) -> Result<Vec<EnteredLoginParam>> {
+        let ctx = self.get_context(account_id).await?;
+        let res = ctx
+            .list_transports()
+            .await?
+            .into_iter()
+            .map(|t| t.param.into())
+            .collect();
+        Ok(res)
+    }
+
+    /// Returns the list of all email accounts that are used as a transport in the current profile.
+    /// Use [Self::add_or_update_transport()] to add or change a transport
+    /// and [Self::delete_transport()] to delete a transport.
+    async fn list_transports_ex(&self, account_id: u32) -> Result<Vec<Transport>> {
         let ctx = self.get_context(account_id).await?;
         let res = ctx
             .list_transports()
@@ -571,6 +589,26 @@ impl CommandApi {
         ctx.delete_transport(&addr).await
     }
 
+    /// Change whether the transport is unpublished.
+    ///
+    /// Unpublished transports are not advertised to contacts,
+    /// and self-sent messages are not sent there,
+    /// so that we don't cause extra messages to the corresponding inbox,
+    /// but can still receive messages from contacts who don't know the new relay addresses yet.
+    ///
+    /// The default is true, but when updating,
+    /// existing secondary transports are set to unpublished,
+    /// so that an existing transport address doesn't suddenly get spammed with a lot of messages.
+    async fn set_transport_unpublished(
+        &self,
+        account_id: u32,
+        addr: String,
+        unpublished: bool,
+    ) -> Result<()> {
+        let ctx = self.get_context(account_id).await?;
+        ctx.set_transport_unpublished(&addr, unpublished).await
+    }
+
     /// Signal an ongoing process to stop.
     async fn stop_ongoing_process(&self, account_id: u32) -> Result<()> {
         let ctx = self.get_context(account_id).await?;

deltachat-jsonrpc/src/api/types/login_param.rs

@@ -4,6 +4,16 @@ use serde::Deserialize;
 use serde::Serialize;
 use yerpc::TypeDef;
 
+#[derive(Serialize, TypeDef, schemars::JsonSchema)]
+#[serde(rename_all = "camelCase")]
+pub struct Transport {
+    /// The login data entered by the user.
+    pub param: EnteredLoginParam,
+    /// Whether this transport is set to 'unpublished'.
+    /// See `set_transport_unpublished` / `setTransportUnpublished` for details.
+    pub is_unpublished: bool,
+}
+
 /// Login parameters entered by the user.
 ///
 /// Usually it will be enough to only set `addr` and `password`,
@@ -56,6 +66,15 @@ pub struct EnteredLoginParam {
     pub oauth2: Option<bool>,
 }
 
+impl From<dc::Transport> for Transport {
+    fn from(transport: dc::Transport) -> Self {
+        Transport {
+            param: transport.param.into(),
+            is_unpublished: transport.is_unpublished,
+        }
+    }
+}
+
 impl From<dc::EnteredLoginParam> for EnteredLoginParam {
     fn from(param: dc::EnteredLoginParam) -> Self {
         let imap_security: Socket = param.imap.security.into();

src/chat.rs

@@ -2737,7 +2737,6 @@ async fn prepare_send_msg(
         chat_id.unarchive_if_not_muted(context, msg.state).await?;
     }
     chat.prepare_msg_raw(context, msg, update_msg_id).await?;
-
     let row_ids = create_send_msg_jobs(context, msg)
         .await
         .context("Failed to create send jobs")?;
@@ -2844,19 +2843,12 @@ pub(crate) async fn create_send_msg_jobs(context: &Context, msg: &mut Message) -
     let lowercase_from = from.to_lowercase();
 
     recipients.retain(|x| x.to_lowercase() != lowercase_from);
-    if context.get_config_bool(Config::BccSelf).await?
-        || msg.param.get_cmd() == SystemMessage::AutocryptSetupMessage
+
+    // Default Webxdc integrations are hidden messages and must not be sent out:
+    if (msg.param.get_int(Param::WebxdcIntegration).is_some() && msg.hidden)
+        // This may happen eg. for groups with only SELF and bcc_self disabled:
+        || (!context.get_config_bool(Config::BccSelf).await? && recipients.is_empty())
     {
-        smtp::add_self_recipients(context, &mut recipients, needs_encryption).await?;
-    }
-
-    // Default Webxdc integrations are hidden messages and must not be sent out
-    if msg.param.get_int(Param::WebxdcIntegration).is_some() && msg.hidden {
-        recipients.clear();
-    }
-
-    if recipients.is_empty() {
-        // may happen eg. for groups with only SELF and bcc_self disabled
         info!(
             context,
             "Message {} has no recipient, skipping smtp-send.", msg.id
@@ -2895,6 +2887,12 @@ pub(crate) async fn create_send_msg_jobs(context: &Context, msg: &mut Message) -
         );
     }
 
+    if context.get_config_bool(Config::BccSelf).await?
+        || msg.param.get_cmd() == SystemMessage::AutocryptSetupMessage
+    {
+        smtp::add_self_recipients(context, &mut recipients, rendered_msg.is_encrypted).await?;
+    }
+
     if needs_encryption && !rendered_msg.is_encrypted {
         /* unrecoverable */
         message::set_msg_failed(

src/config.rs

@@ -837,7 +837,7 @@ impl Context {
                             // which only fetches from the primary transport.
                             transaction
                                 .execute(
-                                    "UPDATE transports SET add_timestamp=? WHERE addr=?",
+                                    "UPDATE transports SET add_timestamp=?, is_published=1 WHERE addr=?",
                                     (time(), addr),
                                 )
                                 .context(
@@ -974,6 +974,21 @@ impl Context {
             .await
     }
 
+    /// Returns all published self addresses, newest first.
+    /// See `[Context::set_transport_unpublished]`
+    pub(crate) async fn get_published_self_addrs(&self) -> Result<Vec<String>> {
+        self.sql
+            .query_map_vec(
+                "SELECT addr FROM transports WHERE is_published=1 ORDER BY add_timestamp DESC",
+                (),
+                |row| {
+                    let addr: String = row.get(0)?;
+                    Ok(addr)
+                },
+            )
+            .await
+    }
+
     /// Returns all secondary self addresses.
     pub(crate) async fn get_secondary_self_addrs(&self) -> Result<Vec<String>> {
         self.sql.query_map_vec("SELECT addr FROM transports WHERE addr NOT IN (SELECT value FROM config WHERE keyname='configured_addr')", (), |row| {
@@ -982,6 +997,23 @@ impl Context {
         }).await
     }
 
+    /// Returns all published secondary self addresses.
+    /// See `[Context::set_transport_unpublished]`
+    pub(crate) async fn get_published_secondary_self_addrs(&self) -> Result<Vec<String>> {
+        self.sql
+            .query_map_vec(
+                "SELECT addr FROM transports
+                WHERE is_published=1
+                AND addr NOT IN (SELECT value FROM config WHERE keyname='configured_addr')",
+                (),
+                |row| {
+                    let addr: String = row.get(0)?;
+                    Ok(addr)
+                },
+            )
+            .await
+    }
+
     /// Returns the primary self address.
     /// Returns an error if no self addr is configured.
     pub async fn get_primary_self_addr(&self) -> Result<String> {

src/configure.rs

@@ -28,8 +28,8 @@ use crate::constants::NON_ALPHANUMERIC_WITHOUT_DOT;
 use crate::context::Context;
 use crate::imap::Imap;
 use crate::log::warn;
-use crate::login_param::EnteredCertificateChecks;
 pub use crate::login_param::EnteredLoginParam;
+use crate::login_param::{EnteredCertificateChecks, Transport};
 use crate::message::Message;
 use crate::net::proxy::ProxyConfig;
 use crate::oauth2::get_oauth2_addr;
@@ -110,6 +110,7 @@ impl Context {
     ///   from a server encoded in a QR code.
     /// - [Self::list_transports()] to get a list of all configured transports.
     /// - [Self::delete_transport()] to remove a transport.
+    /// - [Self::set_transport_unpublished()] to set whether contacts see this transport.
     pub async fn add_or_update_transport(&self, param: &mut EnteredLoginParam) -> Result<()> {
         self.stop_io().await;
         let result = self.add_transport_inner(param).await;
@@ -188,14 +189,22 @@ impl Context {
     /// Returns the list of all email accounts that are used as a transport in the current profile.
     /// Use [Self::add_or_update_transport()] to add or change a transport
     /// and [Self::delete_transport()] to delete a transport.
-    pub async fn list_transports(&self) -> Result<Vec<EnteredLoginParam>> {
+    pub async fn list_transports(&self) -> Result<Vec<Transport>> {
         let transports = self
             .sql
-            .query_map_vec("SELECT entered_param FROM transports", (), |row| {
-                let entered_param: String = row.get(0)?;
-                let transport: EnteredLoginParam = serde_json::from_str(&entered_param)?;
-                Ok(transport)
-            })
+            .query_map_vec(
+                "SELECT entered_param, is_published FROM transports",
+                (),
+                |row| {
+                    let param: String = row.get(0)?;
+                    let param: EnteredLoginParam = serde_json::from_str(&param)?;
+                    let is_published: bool = row.get(1)?;
+                    Ok(Transport {
+                        param,
+                        is_unpublished: !is_published,
+                    })
+                },
+            )
             .await?;
 
         Ok(transports)
@@ -261,6 +270,40 @@ impl Context {
         Ok(())
     }
 
+    /// Change whether the transport is unpublished.
+    ///
+    /// Unpublished transports are not advertised to contacts,
+    /// and self-sent messages are not sent there,
+    /// so that we don't cause extra messages to the corresponding inbox,
+    /// but can still receive messages from contacts who don't know the new relay addresses yet.
+    ///
+    /// The default is true, but when updating,
+    /// existing secondary transports are set to unpublished,
+    /// so that an existing transport address doesn't suddenly get spammed with a lot of messages.
+    pub async fn set_transport_unpublished(&self, addr: &str, unpublished: bool) -> Result<()> {
+        // We need to update the timestamp so that the key's timestamp changes
+        // and is recognized as newer by our peers
+        self.sql
+            .transaction(|trans| {
+                let primary_addr: String = trans.query_row(
+                    "SELECT value FROM config WHERE keyname='configured_addr'",
+                    (),
+                    |row| row.get(0),
+                )?;
+                if primary_addr == addr && unpublished {
+                    bail!("Can't set primary relay as unpublished");
+                }
+                trans.execute(
+                    "UPDATE transports SET is_published=?, add_timestamp=? WHERE addr=?",
+                    (!unpublished, time(), addr),
+                )?;
+                Ok(())
+            })
+            .await?;
+        send_sync_transports(self).await?;
+        Ok(())
+    }
+
     async fn inner_configure(&self, param: &EnteredLoginParam) -> Result<()> {
         info!(self, "Configure ...");
 

src/key.rs

@@ -296,7 +296,7 @@ pub(crate) async fn load_self_public_key_opt(context: &Context) -> Result<Option
         .await?
         .context("No transports configured")?;
     let addr = context.get_primary_self_addr().await?;
-    let all_addrs = context.get_all_self_addrs().await?.join(",");
+    let all_addrs = context.get_published_self_addrs().await?.join(",");
     let signed_public_key =
         secret_key_to_public_key(context, signed_secret_key, timestamp, &addr, &all_addrs)?;
     *lock = Some(signed_public_key.clone());

src/login_param.rs

@@ -79,6 +79,16 @@ pub struct EnteredServerLoginParam {
     pub password: String,
 }
 
+/// A transport, as shown in the "relays" list in the UI.
+#[derive(Debug)]
+pub struct Transport {
+    /// The login data entered by the user.
+    pub param: EnteredLoginParam,
+    /// Whether this transport is set to 'unpublished'.
+    /// See [`Context::set_transport_unpublished`] for details.
+    pub is_unpublished: bool,
+}
+
 /// Login parameters entered by the user.
 #[derive(Debug, Default, Clone, PartialEq, Eq, Serialize, Deserialize)]
 pub struct EnteredLoginParam {

src/mimeparser/shared_secret_decryption_tests.rs

@@ -204,7 +204,7 @@ async fn test_qr_code_security() -> Result<()> {
     let charlie_addr = charlie.get_config(Config::Addr).await?.unwrap();
 
     let alice_fp = self_fingerprint(alice).await?;
-    let secret_for_encryption = dbg!(format!("securejoin/{alice_fp}/{authcode}"));
+    let secret_for_encryption = format!("securejoin/{alice_fp}/{authcode}");
     test_shared_secret_decryption_ex(
         bob,
         &charlie_addr,

src/smtp.rs

@@ -701,12 +701,12 @@ pub(crate) async fn add_self_recipients(
     // and connection is frequently lost
     // before receiving status line. NB: This is not a problem for chatmail servers, so `BccSelf`
     // disabled by default is fine.
-    if context.get_config_delete_server_after().await? != Some(0) || !recipients.is_empty() {
+    if (context.get_config_delete_server_after().await? != Some(0)) || !recipients.is_empty() {
         // Avoid sending unencrypted messages to all transports, chatmail relays won't accept
         // them. Normally the user should have a non-chatmail primary transport to send unencrypted
         // messages.
         if encrypted {
-            for addr in context.get_secondary_self_addrs().await? {
+            for addr in context.get_published_secondary_self_addrs().await? {
                 recipients.push(addr);
             }
         }

src/sql/migrations.rs

@@ -2343,6 +2343,26 @@ ALTER TABLE contacts ADD COLUMN name_normalized TEXT;
         .await?;
     }
 
+    // Add an `is_published` flag to transports.
+    // Unpublished transports are not advertised to contacts,
+    // and self-sent messages are not sent there,
+    // so that we don't cause extra messages to the corresponding inbox,
+    // but can still receive messages from contacts who don't know the new relay addresses yet.
+    // The default is true, but when updating,
+    // existing secondary transports are set to unpublished,
+    // so that an existing transport address doesn't suddenly get spammed with a lot of messages.
+    inc_and_check(&mut migration_version, 149)?;
+    if dbversion < migration_version {
+        sql.execute_migration(
+            "ALTER TABLE transports ADD COLUMN is_published INTEGER DEFAULT 1 NOT NULL;
+            UPDATE transports SET is_published=0 WHERE addr!=(
+                SELECT value FROM config WHERE keyname='configured_addr'
+            )",
+            migration_version,
+        )
+        .await?;
+    }
+
     let new_version = sql
         .get_raw_config_int(VERSION_CFG)
         .await?

src/sync.rs

@@ -65,6 +65,10 @@ pub(crate) struct TransportData {
 
     /// Timestamp of when the transport was last time (re)configured.
     pub(crate) timestamp: i64,
+
+    /// Whether the transport is published.
+    /// See [`Context::set_transport_unpublished`] for details.
+    pub(crate) is_published: bool,
 }
 
 #[derive(Debug, Serialize, Deserialize)]

src/test_utils.rs

@@ -211,7 +211,7 @@ impl TestContextManager {
             "INSERT OR IGNORE INTO transports (addr, entered_param, configured_param) VALUES (?, ?, ?)",
                (
                    new_addr,
-                   serde_json::to_string(&EnteredLoginParam::default()).unwrap(),
+                   serde_json::to_string(&EnteredLoginParam{addr: new_addr.to_string(), ..Default::default()}).unwrap(),
                    format!(r#"{{"addr":"{new_addr}","imap":[],"imap_user":"","imap_password":"","smtp":[],"smtp_user":"","smtp_password":"","certificate_checks":"Automatic","oauth2":false}}"#)
               ),
           ).await.unwrap();

src/transport.rs

@@ -562,7 +562,15 @@ impl ConfiguredLoginParam {
         entered_param: &EnteredLoginParam,
         timestamp: i64,
     ) -> Result<()> {
-        save_transport(context, entered_param, &self.into(), timestamp).await?;
+        let is_published = true;
+        save_transport(
+            context,
+            entered_param,
+            &self.into(),
+            timestamp,
+            is_published,
+        )
+        .await?;
         Ok(())
     }
 
@@ -628,6 +636,7 @@ pub(crate) async fn save_transport(
     entered_param: &EnteredLoginParam,
     configured: &ConfiguredLoginParamJson,
     add_timestamp: i64,
+    is_published: bool,
 ) -> Result<bool> {
     let addr = addr_normalize(&configured.addr);
     let configured_addr = context.get_config(Config::ConfiguredAddr).await?;
@@ -635,20 +644,23 @@ pub(crate) async fn save_transport(
     let mut modified = context
         .sql
         .execute(
-            "INSERT INTO transports (addr, entered_param, configured_param, add_timestamp)
-             VALUES (?, ?, ?, ?)
+            "INSERT INTO transports (addr, entered_param, configured_param, add_timestamp, is_published)
+             VALUES (?, ?, ?, ?, ?)
              ON CONFLICT (addr)
              DO UPDATE SET entered_param=excluded.entered_param,
                            configured_param=excluded.configured_param,
-                           add_timestamp=excluded.add_timestamp
+                           add_timestamp=excluded.add_timestamp,
+                           is_published=excluded.is_published
              WHERE entered_param != excluded.entered_param
                  OR configured_param != excluded.configured_param
-                 OR add_timestamp < excluded.add_timestamp",
+                 OR add_timestamp < excluded.add_timestamp
+                 OR is_published != excluded.is_published",
             (
                 &addr,
                 serde_json::to_string(entered_param)?,
                 serde_json::to_string(configured)?,
                 add_timestamp,
+                is_published,
             ),
         )
         .await?
@@ -685,7 +697,7 @@ pub(crate) async fn send_sync_transports(context: &Context) -> Result<()> {
     let transports = context
         .sql
         .query_map_vec(
-            "SELECT entered_param, configured_param, add_timestamp
+            "SELECT entered_param, configured_param, add_timestamp, is_published
              FROM transports WHERE id>1",
             (),
             |row| {
@@ -694,10 +706,12 @@ pub(crate) async fn send_sync_transports(context: &Context) -> Result<()> {
                 let configured_json: String = row.get(1)?;
                 let configured: ConfiguredLoginParamJson = serde_json::from_str(&configured_json)?;
                 let timestamp: i64 = row.get(2)?;
+                let is_published: bool = row.get(3)?;
                 Ok(TransportData {
                     configured,
                     entered,
                     timestamp,
+                    is_published,
                 })
             },
         )
@@ -736,9 +750,10 @@ pub(crate) async fn sync_transports(
         configured,
         entered,
         timestamp,
+        is_published,
     } in transports
     {
-        modified |= save_transport(context, entered, configured, *timestamp).await?;
+        modified |= save_transport(context, entered, configured, *timestamp, *is_published).await?;
     }
 
     context
@@ -784,7 +799,7 @@ pub(crate) async fn add_pseudo_transport(context: &Context, addr: &str) -> Resul
             "INSERT INTO transports (addr, entered_param, configured_param) VALUES (?, ?, ?)",
             (
                 addr,
-                serde_json::to_string(&EnteredLoginParam::default())?,
+                serde_json::to_string(&EnteredLoginParam{addr: addr.to_string(), ..Default::default()})?,
                 format!(r#"{{"addr":"{addr}","imap":[],"imap_user":"","imap_password":"","smtp":[],"smtp_user":"","smtp_password":"","certificate_checks":"Automatic","oauth2":false}}"#)
             ),
         )

src/transport/transport_tests.rs

@@ -1,7 +1,13 @@
+use std::collections::BTreeSet;
+use std::time::Duration;
+
+use crate::tools::SystemTime;
+
 use super::*;
 use crate::log::LogExt as _;
 use crate::provider::get_provider_by_id;
 use crate::test_utils::TestContext;
+use crate::test_utils::TestContextManager;
 use crate::tools::time;
 
 #[test]
@@ -239,34 +245,9 @@ async fn test_empty_server_list() -> Result<()> {
 
     let addr = format!("alice@{domain}");
 
-    ConfiguredLoginParam {
-        addr: addr.clone(),
-        imap: vec![ConfiguredServerLoginParam {
-            connection: ConnectionCandidate {
-                host: "example.org".to_string(),
-                port: 100,
-                security: ConnectionSecurity::Tls,
-            },
-            user: addr.clone(),
-        }],
-        imap_user: addr.clone(),
-        imap_password: "foobarbaz".to_string(),
-        smtp: vec![ConfiguredServerLoginParam {
-            connection: ConnectionCandidate {
-                host: "example.org".to_string(),
-                port: 100,
-                security: ConnectionSecurity::Tls,
-            },
-            user: addr.clone(),
-        }],
-        smtp_user: addr.clone(),
-        smtp_password: "foobarbaz".to_string(),
-        provider: Some(provider),
-        certificate_checks: ConfiguredCertificateChecks::Automatic,
-        oauth2: false,
-    }
-    .save_to_transports_table(&t, &EnteredLoginParam::default(), time())
-    .await?;
+    dummy_configured_login_param(&addr, Some(provider))
+        .save_to_transports_table(&t, &EnteredLoginParam::default(), time())
+        .await?;
 
     let (_transport_id, loaded) = ConfiguredLoginParam::load(&t).await?.unwrap();
     assert_eq!(loaded.provider, Some(*provider));
@@ -276,3 +257,229 @@ async fn test_empty_server_list() -> Result<()> {
 
     Ok(())
 }
+
+fn dummy_configured_login_param(
+    addr: &str,
+    provider: Option<&'static Provider>,
+) -> ConfiguredLoginParam {
+    ConfiguredLoginParam {
+        addr: addr.to_string(),
+        imap: vec![ConfiguredServerLoginParam {
+            connection: ConnectionCandidate {
+                host: "example.org".to_string(),
+                port: 100,
+                security: ConnectionSecurity::Tls,
+            },
+            user: addr.to_string(),
+        }],
+        imap_user: addr.to_string(),
+        imap_password: "foobarbaz".to_string(),
+        smtp: vec![ConfiguredServerLoginParam {
+            connection: ConnectionCandidate {
+                host: "example.org".to_string(),
+                port: 100,
+                security: ConnectionSecurity::Tls,
+            },
+            user: addr.to_string(),
+        }],
+        smtp_user: addr.to_string(),
+        smtp_password: "foobarbaz".to_string(),
+        provider,
+        certificate_checks: ConfiguredCertificateChecks::Automatic,
+        oauth2: false,
+    }
+}
+
+#[tokio::test(flavor = "multi_thread", worker_threads = 2)]
+async fn test_is_published_flag() -> Result<()> {
+    let mut tcm = TestContextManager::new();
+    let alice = &tcm.alice().await;
+    let alice2 = &tcm.alice().await;
+    for a in [alice, alice2] {
+        a.set_config_bool(Config::SyncMsgs, true).await?;
+        a.set_config_bool(Config::BccSelf, true).await?;
+    }
+    let bob = &tcm.bob().await;
+
+    check_addrs(
+        alice,
+        alice2,
+        bob,
+        Addresses {
+            primary: "alice@example.org",
+            secondary_published: &[],
+            secondary_unpublished: &[],
+        },
+    )
+    .await;
+
+    dummy_configured_login_param("alice@otherprovider.com", None)
+        .save_to_transports_table(
+            alice,
+            &EnteredLoginParam {
+                addr: "alice@otherprovider.com".to_string(),
+                ..Default::default()
+            },
+            time(),
+        )
+        .await?;
+    send_sync_transports(alice).await?;
+    sync_and_check_recipients(alice, alice2, "alice@otherprovider.com alice@example.org").await;
+
+    check_addrs(
+        alice,
+        alice2,
+        bob,
+        Addresses {
+            primary: "alice@example.org",
+            secondary_published: &["alice@otherprovider.com"],
+            secondary_unpublished: &[],
+        },
+    )
+    .await;
+
+    assert_eq!(
+        alice
+            .set_transport_unpublished("alice@example.org", true)
+            .await
+            .unwrap_err()
+            .to_string(),
+        "Can't set primary relay as unpublished"
+    );
+
+    // Make sure that the newly generated key has a newer timestamp,
+    // so that it is recognized by Bob:
+    SystemTime::shift(Duration::from_secs(2));
+
+    alice
+        .set_transport_unpublished("alice@otherprovider.com", true)
+        .await?;
+    sync_and_check_recipients(alice, alice2, "alice@example.org").await;
+
+    check_addrs(
+        alice,
+        alice2,
+        bob,
+        Addresses {
+            primary: "alice@example.org",
+            secondary_published: &[],
+            secondary_unpublished: &["alice@otherprovider.com"],
+        },
+    )
+    .await;
+
+    SystemTime::shift(Duration::from_secs(2));
+
+    alice
+        .set_config(Config::ConfiguredAddr, Some("alice@otherprovider.com"))
+        .await?;
+    sync_and_check_recipients(alice, alice2, "alice@example.org alice@otherprovider.com").await;
+
+    check_addrs(
+        alice,
+        alice2,
+        bob,
+        Addresses {
+            primary: "alice@otherprovider.com",
+            secondary_published: &["alice@example.org"],
+            secondary_unpublished: &[],
+        },
+    )
+    .await;
+
+    Ok(())
+}
+
+struct Addresses {
+    primary: &'static str,
+    secondary_published: &'static [&'static str],
+    secondary_unpublished: &'static [&'static str],
+}
+
+async fn check_addrs(
+    alice: &TestContext,
+    alice2: &TestContext,
+    bob: &TestContext,
+    addresses: Addresses,
+) {
+    fn assert_eq(left: Vec<String>, right: Vec<&'static str>) {
+        assert_eq!(
+            left.iter().map(|s| s.as_str()).collect::<BTreeSet<_>>(),
+            right.into_iter().collect::<BTreeSet<_>>(),
+        )
+    }
+
+    let published_self_addrs = concat(&[addresses.secondary_published, &[addresses.primary]]);
+    for a in [alice2, alice] {
+        assert_eq(
+            a.get_all_self_addrs().await.unwrap(),
+            concat(&[
+                addresses.secondary_published,
+                addresses.secondary_unpublished,
+                &[addresses.primary],
+            ]),
+        );
+        assert_eq(
+            a.get_published_self_addrs().await.unwrap(),
+            published_self_addrs.clone(),
+        );
+        assert_eq(
+            a.get_secondary_self_addrs().await.unwrap(),
+            concat(&[
+                addresses.secondary_published,
+                addresses.secondary_unpublished,
+            ]),
+        );
+        assert_eq(
+            a.get_published_secondary_self_addrs().await.unwrap(),
+            concat(&[addresses.secondary_published]),
+        );
+        for transport in a.list_transports().await.unwrap() {
+            if addresses.primary == transport.param.addr
+                || addresses
+                    .secondary_published
+                    .contains(&transport.param.addr.as_str())
+            {
+                assert_eq!(transport.is_unpublished, false);
+            } else if addresses
+                .secondary_unpublished
+                .contains(&transport.param.addr.as_str())
+            {
+                assert_eq!(transport.is_unpublished, true);
+            } else {
+                panic!("Unexpected transport {transport:?}");
+            }
+        }
+
+        let alice_bob_chat_id = a.create_chat_id(bob).await;
+        let sent = a.send_text(alice_bob_chat_id, "hi").await;
+        assert_eq!(
+            sent.recipients,
+            format!("bob@example.net {}", published_self_addrs.join(" ")),
+            "{} is sending to the wrong set of recipients",
+            a.name()
+        );
+        let bob_alice_chat_id = bob.recv_msg(&sent).await.chat_id;
+        bob_alice_chat_id.accept(bob).await.unwrap();
+        let answer = bob.send_text(bob_alice_chat_id, "hi back").await;
+        assert_eq(
+            answer.recipients.split(' ').map(Into::into).collect(),
+            concat(&[&published_self_addrs, &["bob@example.net"]]),
+        );
+    }
+}
+
+fn concat(slices: &[&[&'static str]]) -> Vec<&'static str> {
+    let mut res = vec![];
+    for s in slices {
+        res.extend(*s);
+    }
+    res
+}
+
+pub async fn sync_and_check_recipients(from: &TestContext, to: &TestContext, recipients: &str) {
+    from.send_sync_msg().await.unwrap();
+    let sync_msg = from.pop_sent_msg().await;
+    assert_eq!(sync_msg.recipients, recipients);
+    to.recv_msg_trash(&sync_msg).await;
+}