@ -1083,6 +1083,21 @@ Too large messages and triggering the spam filter of an email server are the mos
* *503 5.5.0 Recipient already specified* mostly means that an address is being used both as TO and CC address
* *554 5.7.1 ... not permitted to relay* means that the email server does not recognize the username/email address. Please double check the host name and username/email address in the identity settings.
* *550 Spam message rejected because IP is listed by ...* means that the email server rejected to send a message from the current (public) network address because it was misused to send spam by (hopefully) somebody else before. Please try to enable flight mode for 10 minutes to acquire a new network address.
* *571 5.7.1 Message contains spam or virus or sender is blocked ...* means that the email server considered an outgoing message as spam. This probably means that the spam filters of the email server are too strict. You'll need to contact the email provider for support on this.
If you want to use the Gmail SMTP server to workaround a too strict outgoing spam filter or to improve delivery of messages:
* Verify your email address [here](https://mail.google.com/mail/u/0/#settings/accounts) (you'll need to use a desktop browser for this)
* Change the identity settings like this (setup, step 2, tap Manage, tap identity):