diff --git a/app/src/main/java/eu/faircode/email/EmailProvider.java b/app/src/main/java/eu/faircode/email/EmailProvider.java
index 20111743cd..27db1075df 100644
--- a/app/src/main/java/eu/faircode/email/EmailProvider.java
+++ b/app/src/main/java/eu/faircode/email/EmailProvider.java
@@ -531,6 +531,7 @@ public class EmailProvider {
     @NonNull
     private static EmailProvider fromTemplate(Context context, String domain, Discover discover)
             throws ExecutionException, InterruptedException, UnknownHostException {
+        // https://tools.ietf.org/html/rfc8314
         Server imap = null;
         Server smtp = null;