Hello
I have the following problem:
Looking at the email queue, I see some messages that say “deferred.” I tried sending emails and checking the queue at the same time to see what anomalies I found.
Interestingly, in the “recipients” column, I found an email address to which I didn’t send anything; I don’t even know it. This account is “[email protected]”
And it presents the following error:
[{“address":"[email protected]”,“delay_reason”:“host alt1.gmail-smtp-in.l.google.com[64.233.184.26] said: 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. gsmtp (in reply to RCPT TO command)”}]
The funny thing is that I tried several accounts from different domains, and the same thing happens several times (only that Gmail address is added).
Is it possible that the server has malware or a virus or something?
How do I fix it?
Thank you very much.