diff --git a/src/provider/data.rs b/src/provider/data.rs
index bb850c86e..cf695adff 100644
--- a/src/provider/data.rs
+++ b/src/provider/data.rs
@@ -31,7 +31,7 @@ static P_AKTIVIX_ORG: Lazy<Provider> = Lazy::new(|| Provider {
         },
     ],
     config_defaults: None,
-    strict_tls: false,
+    strict_tls: true,
     max_smtp_rcpt_to: None,
     oauth2_authorizer: None,
 });
@@ -44,9 +44,11 @@ static P_AOL: Lazy<Provider> = Lazy::new(|| {
     after_login_hint: "",
     overview_page: "https://providers.delta.chat/aol",
     server: vec![
+        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 },
     ],
     config_defaults: None,
-    strict_tls: false,
+    strict_tls: true,
     max_smtp_rcpt_to: None,
     oauth2_authorizer: None,
 }
@@ -75,7 +77,7 @@ static P_ARCOR_DE: Lazy<Provider> = Lazy::new(|| Provider {
         },
     ],
     config_defaults: None,
-    strict_tls: false,
+    strict_tls: true,
     max_smtp_rcpt_to: None,
     oauth2_authorizer: None,
 });
@@ -103,7 +105,7 @@ static P_AUTISTICI_ORG: Lazy<Provider> = Lazy::new(|| Provider {
         },
     ],
     config_defaults: None,
-    strict_tls: false,
+    strict_tls: true,
     max_smtp_rcpt_to: None,
     oauth2_authorizer: None,
 });
@@ -131,7 +133,7 @@ static P_BLUEWIN_CH: Lazy<Provider> = Lazy::new(|| Provider {
         },
     ],
     config_defaults: None,
-    strict_tls: false,
+    strict_tls: true,
     max_smtp_rcpt_to: None,
     oauth2_authorizer: None,
 });
@@ -187,7 +189,7 @@ static P_CHELLO_AT: Lazy<Provider> = Lazy::new(|| Provider {
         },
     ],
     config_defaults: None,
-    strict_tls: false,
+    strict_tls: true,
     max_smtp_rcpt_to: None,
     oauth2_authorizer: None,
 });
@@ -200,7 +202,7 @@ static P_COMCAST: Lazy<Provider> = Lazy::new(|| Provider {
     overview_page: "https://providers.delta.chat/comcast",
     server: vec![],
     config_defaults: None,
-    strict_tls: false,
+    strict_tls: true,
     max_smtp_rcpt_to: None,
     oauth2_authorizer: None,
 });
@@ -213,7 +215,7 @@ static P_DISMAIL_DE: Lazy<Provider> = Lazy::new(|| Provider {
     overview_page: "https://providers.delta.chat/dismail-de",
     server: vec![],
     config_defaults: None,
-    strict_tls: false,
+    strict_tls: true,
     max_smtp_rcpt_to: None,
     oauth2_authorizer: None,
 });
@@ -295,7 +297,7 @@ static P_EXAMPLE_COM: Lazy<Provider> = Lazy::new(|| {
         Server { protocol: SMTP, socket: STARTTLS, hostname: "smtp.example.com", port: 1337, username_pattern: EMAIL },
     ],
     config_defaults: None,
-    strict_tls: false,
+    strict_tls: true,
     max_smtp_rcpt_to: None,
     oauth2_authorizer: None,
 }
@@ -310,7 +312,7 @@ static P_FASTMAIL: Lazy<Provider> = Lazy::new(|| Provider {
     overview_page: "https://providers.delta.chat/fastmail",
     server: vec![],
     config_defaults: None,
-    strict_tls: false,
+    strict_tls: true,
     max_smtp_rcpt_to: None,
     oauth2_authorizer: None,
 });
@@ -325,7 +327,7 @@ static P_FIREMAIL_DE: Lazy<Provider> = Lazy::new(|| {
     server: vec![
     ],
     config_defaults: None,
-    strict_tls: false,
+    strict_tls: true,
     max_smtp_rcpt_to: None,
     oauth2_authorizer: None,
 }
@@ -384,7 +386,7 @@ static P_FREENET_DE: Lazy<Provider> = Lazy::new(|| Provider {
         },
     ],
     config_defaults: None,
-    strict_tls: false,
+    strict_tls: true,
     max_smtp_rcpt_to: None,
     oauth2_authorizer: None,
 });
@@ -437,7 +439,7 @@ static P_GMX_NET: Lazy<Provider> = Lazy::new(|| Provider {
         },
     ],
     config_defaults: None,
-    strict_tls: false,
+    strict_tls: true,
     max_smtp_rcpt_to: None,
     oauth2_authorizer: None,
 });
@@ -482,7 +484,7 @@ static P_HEY_COM: Lazy<Provider> = Lazy::new(|| {
     server: vec![
     ],
     config_defaults: None,
-    strict_tls: false,
+    strict_tls: true,
     max_smtp_rcpt_to: None,
     oauth2_authorizer: None,
 }
@@ -496,7 +498,7 @@ static P_I_UA: Lazy<Provider> = Lazy::new(|| Provider {
     overview_page: "https://providers.delta.chat/i-ua",
     server: vec![],
     config_defaults: None,
-    strict_tls: false,
+    strict_tls: true,
     max_smtp_rcpt_to: None,
     oauth2_authorizer: None,
 });
@@ -525,7 +527,7 @@ static P_ICLOUD: Lazy<Provider> = Lazy::new(|| Provider {
         },
     ],
     config_defaults: None,
-    strict_tls: false,
+    strict_tls: true,
     max_smtp_rcpt_to: None,
     oauth2_authorizer: None,
 });
@@ -538,7 +540,7 @@ static P_KOLST_COM: Lazy<Provider> = Lazy::new(|| Provider {
     overview_page: "https://providers.delta.chat/kolst-com",
     server: vec![],
     config_defaults: None,
-    strict_tls: false,
+    strict_tls: true,
     max_smtp_rcpt_to: None,
     oauth2_authorizer: None,
 });
@@ -551,7 +553,7 @@ static P_KONTENT_COM: Lazy<Provider> = Lazy::new(|| Provider {
     overview_page: "https://providers.delta.chat/kontent-com",
     server: vec![],
     config_defaults: None,
-    strict_tls: false,
+    strict_tls: true,
     max_smtp_rcpt_to: None,
     oauth2_authorizer: None,
 });
@@ -564,7 +566,7 @@ static P_MAIL_RU: Lazy<Provider> = Lazy::new(|| Provider {
     overview_page: "https://providers.delta.chat/mail-ru",
     server: vec![],
     config_defaults: None,
-    strict_tls: false,
+    strict_tls: true,
     max_smtp_rcpt_to: None,
     oauth2_authorizer: None,
 });
@@ -621,7 +623,7 @@ static P_OUTLOOK_COM: Lazy<Provider> = Lazy::new(|| {
         Server { protocol: SMTP, socket: STARTTLS, hostname: "smtp-mail.outlook.com", port: 587, username_pattern: EMAIL },
     ],
     config_defaults: None,
-    strict_tls: false,
+    strict_tls: true,
     max_smtp_rcpt_to: None,
     oauth2_authorizer: None,
 }
@@ -665,7 +667,7 @@ static P_PROTONMAIL: Lazy<Provider> = Lazy::new(|| {
     server: vec![
     ],
     config_defaults: None,
-    strict_tls: false,
+    strict_tls: true,
     max_smtp_rcpt_to: None,
     oauth2_authorizer: None,
 }
@@ -692,7 +694,7 @@ static P_ROGERS_COM: Lazy<Provider> = Lazy::new(|| Provider {
     overview_page: "https://providers.delta.chat/rogers-com",
     server: vec![],
     config_defaults: None,
-    strict_tls: false,
+    strict_tls: true,
     max_smtp_rcpt_to: None,
     oauth2_authorizer: None,
 });
@@ -718,9 +720,11 @@ static P_T_ONLINE: Lazy<Provider> = Lazy::new(|| {
     after_login_hint: "",
     overview_page: "https://providers.delta.chat/t-online",
     server: vec![
+        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 },
     ],
     config_defaults: None,
-    strict_tls: false,
+    strict_tls: true,
     max_smtp_rcpt_to: None,
     oauth2_authorizer: None,
 }
@@ -801,7 +805,7 @@ static P_TISCALI_IT: Lazy<Provider> = Lazy::new(|| Provider {
         },
     ],
     config_defaults: None,
-    strict_tls: false,
+    strict_tls: true,
     max_smtp_rcpt_to: None,
     oauth2_authorizer: None,
 });
@@ -814,7 +818,7 @@ static P_UKR_NET: Lazy<Provider> = Lazy::new(|| Provider {
     overview_page: "https://providers.delta.chat/ukr-net",
     server: vec![],
     config_defaults: None,
-    strict_tls: false,
+    strict_tls: true,
     max_smtp_rcpt_to: None,
     oauth2_authorizer: None,
 });
@@ -855,7 +859,7 @@ static P_VFEMAIL: Lazy<Provider> = Lazy::new(|| Provider {
     overview_page: "https://providers.delta.chat/vfemail",
     server: vec![],
     config_defaults: None,
-    strict_tls: false,
+    strict_tls: true,
     max_smtp_rcpt_to: None,
     oauth2_authorizer: None,
 });
@@ -883,7 +887,7 @@ static P_VODAFONE_DE: Lazy<Provider> = Lazy::new(|| Provider {
         },
     ],
     config_defaults: None,
-    strict_tls: false,
+    strict_tls: true,
     max_smtp_rcpt_to: None,
     oauth2_authorizer: None,
 });
@@ -901,7 +905,7 @@ static P_WEB_DE: Lazy<Provider> = Lazy::new(|| {
         Server { protocol: SMTP, socket: STARTTLS, hostname: "smtp.web.de", port: 587, username_pattern: EMAILLOCALPART },
     ],
     config_defaults: None,
-    strict_tls: false,
+    strict_tls: true,
     max_smtp_rcpt_to: None,
     oauth2_authorizer: None,
 }
@@ -919,7 +923,7 @@ static P_YAHOO: Lazy<Provider> = Lazy::new(|| {
         Server { protocol: SMTP, socket: SSL, hostname: "smtp.mail.yahoo.com", port: 465, username_pattern: EMAIL },
     ],
     config_defaults: None,
-    strict_tls: false,
+    strict_tls: true,
     max_smtp_rcpt_to: None,
     oauth2_authorizer: None,
 }
@@ -976,7 +980,7 @@ static P_ZIGGO_NL: Lazy<Provider> = Lazy::new(|| Provider {
         },
     ],
     config_defaults: None,
-    strict_tls: false,
+    strict_tls: true,
     max_smtp_rcpt_to: None,
     oauth2_authorizer: None,
 });
@@ -1153,4 +1157,4 @@ pub static PROVIDER_DATA: Lazy<HashMap<&'static str, &'static Provider>> = Lazy:
 });
 
 pub static PROVIDER_UPDATED: Lazy<chrono::NaiveDate> =
-    Lazy::new(|| chrono::NaiveDate::from_ymd(2020, 10, 30));
+    Lazy::new(|| chrono::NaiveDate::from_ymd(2020, 12, 26));
diff --git a/src/provider/update.py b/src/provider/update.py
index 2a045ab18..7b1686620 100755
--- a/src/provider/update.py
+++ b/src/provider/update.py
@@ -101,7 +101,7 @@ def process_data(data, file):
 
     config_defaults = process_config_defaults(data)
 
-    strict_tls = data.get("strict_tls", False)
+    strict_tls = data.get("strict_tls", True)
     strict_tls = "true" if strict_tls else "false"
 
     max_smtp_rcpt_to = data.get("max_smtp_rcpt_to", 0)