diff --git a/app/src/main/res/xml/providers.xml b/app/src/main/res/xml/providers.xml
index 883dcafa21..d07c0c2260 100644
--- a/app/src/main/res/xml/providers.xml
+++ b/app/src/main/res/xml/providers.xml
@@ -126,8 +126,9 @@
             starttls="false" />
         <smtp
             host="smtp.fastmail.com"
-            port="465"
+            port="565"
             starttls="false" />
+        <!-- https://twitter.com/fastmail/status/569046903855271937 -->
     </provider>
     <!-- no IMAP IDLE -->
     <provider