@ -1157,6 +1157,7 @@ Too large messages and triggering the spam filter of an email server are the mos
* *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.
* *550 We're sorry, but we can't send your email. Either the subject matter, a link, or an attachment potentially contains spam, or phishing or malware.* means that the email provider considers an outgong message as harmful.
* *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.
* *451 4.7.0 Temporary server error. Please try again later. PRX4 ...*: please [see here](https://judeperera.wordpress.com/2019/10/11/fixing-451-4-7-0-temporary-server-error-please-try-again-later-prx4/).
If you want to use the Gmail SMTP server to workaround a too strict outgoing spam filter or to improve delivery of messages:
M66B
4 years ago