On 29 Sep 2016, at 18:48, Motty Cruz wrote:
Hello, I see the following errors on SMTP server logs:
E7AA017645 556 Thu Sep 29 15:43:13 us...@fqdn.com
(host alt1.gmail-smtp-in.l.google.com[74.125.69.27] said: 421-4.7.0
This
message does not have authentication information or fails to pass
421-4.7.0
authentication checks. To best protect our users from spam, the
421-4.7.0
message has been blocked. Please visit 421-4.7.0
https://support.google.com/mail/answer/81126#authentication for more
421
4.7.0 information. o78si810588ita.33 - gsmtp (in reply to end of DATA
command))
We are not spammers, we're legitimate, full qualify domain name. Any
ideas?
I know this seems crazy but it just might work: You could read the web
page cited in the error message and do what it recommends.
