So I've set up a postfix email server, I can send, I can receive. But I noticed some interesting activity in my logs. I was testing an accidentally sent to a non-existent email address, now the mailserver on the other domain is trying (without giving up) to deliver the failed delivery notification.
For this example, my domain name is example.com the domain I sent the email to is example.net I sent an email out to an address that is invalid. Of course, the example.net mail server says, "hey this address doesn't exist" and wants to return an email to me saying that this address doesn't exist. Here is the log
Jan 27 08:50:37 UBUNTU-SRV postfix/smtpd: connect from remote.example.net[188.8.131.52] Jan 27 08:50:37 UBUNTU-SRV postfix/smtpd: NOQUEUE: reject: RCPT from remote.example.net[184.108.40.206]: 450 4.1.1 "firstname.lastname@example.org": Recipient address rejected: User unknown in local recipient table; from=<> to= "email@example.com" proto=ESMTP helo= "mail.otherdomain.local" Jan 27 08:50:37 UBUNTU-SRV postfix/smtpd: disconnect from remote.example.net[220.127.116.11]
My hunch is that my server says, "does 'firstname.lastname@example.org' have a user account?" the answer obviously is no, so then it rejects. These logs have been running about every minute for a day now.
Any ideas to either get this email put in the right box or at minimum route all these things to a dir on my box for now?