[There are numerous similar questions on ServerFault but I couldn't find one that was exactly on point]
Background: I use Gmail for my email client. My email is firstname.lastname@example.org. However the email that people communicate to me with is email@example.com. I run the server that hosts www.example.com and other domains, at ServerBeach.
Up to yesterday, I had SENDMAIL painlessly just forward emails to firstname.lastname@example.org to email@example.com and everything was fine, for several years in fact.
Suddenly my email stopped working - that is, my gmail account stopped receiving emails via the forward from my server.
Looking into it I found a bunch of emails sitting on my server with content like this:
... while talking to gmail-smtp-in.l.google.com.: >>> RCPT To:<firstname.lastname@example.org> <<< 450-4.2.1 The user you are trying to contact is receiving mail at a rate that <<< 450-4.2.1 prevents additional messages from being delivered. Please resend your <<< 450-4.2.1 message at a later time. If the user is able to receive mail at that <<< 450-4.2.1 time, your message will be delivered. For more information, please <<< 450 4.2.1 visit xxxxxx://mail.google.com/support/bin/answer.py?answer=6592 u15si37138086qco.76 email@example.com... Deferred: 450-4.2.1 The user you are trying to contact is receiving mail at a rate that >>> DATA <<< 550-5.7.1 [18.104.22.168 1] Our system has detected an unusual rate of <<< 550-5.7.1 unsolicited mail originating from your IP address. To protect our <<< 550-5.7.1 users from spam, mail sent from your IP address has been blocked. <<< 550-5.7.1 Please visit xxxxx://www.google.com/mail/help/bulk_mail.html to review <<< 550 5.7.1 our Bulk Email Senders Guidelines. u15si37138086qco.76 554 5.0.0 Service unavailable ... while talking to alt1.gmail-smtp-in.l.google.com.:
From what I've been researching, I think somehow someone has/is hijacking my domain name or something and this somehow has caused gmail's servers to notice and cut me off. But I don't know really what's going on nor do I see whatever emails might be involved.
I've read stuff on zoneedit.com that sounds like they might have a solution in their service for what I am trying to do. I also read a lot about admining DNS and SENDMAIL and tried various things, but nothing works.
- Can you tell from my description what is going on that caused GMail's server to stop accepting email from my server and is there a way to stop it?
- What is the 'correct' way to configure things so that emails to firstname.lastname@example.org behave as if they were sent to email@example.com?