Bug #286196 --> Thunderbird trunk throws up "String ID 5104" instead of the "This server requires authentication..." text.

mail/locales/en-US/chrome/messenger/imapMsgs.properties

@@ -445,3 +445,7 @@ reduce the number of cached connections.
 # Place the word %2$S where the total number of messages should appear.
 
 5103=Copying Message %1$S of %2$S to %3$S
+
+## @name IMAP_LOGIN_DISABLED
+## @loc None
+5104=You cannot log in to %S because the server has disabled login. You may need to connect via SSL or TLS. Please check the account settings for your mail server.