One of our clients having trouble receiving my to their domain, let’s say (a.com). The MX record is correct and I can send out from my account. Here is the error I get when I try to send to a@a.com from another account outside of this server…

SMTP error from remote mailer after RCPT TO:<a@a.com>:
host a@.com [69.44.57.240]: 550-relay1.hrnoc.net [216.120.226.254] is currently not permitted to relay
550-through this server. Perhaps you have not logged into the pop/imap server
550-in the last 30 minutes or do not have SMTP Authentication turned on in your
550 email client.

Local hosts work just fine and relay it is outside entities… even if we send from webmail, not from e-mail client, we still have this problem. it looks like we sent it from e-mail clients but we didn’t.

To solve this problem, it’s quite simple ;)

Login to your server, as root of course…

Check at your /etc/localdomains , and make sure that “a.com” without quote is listed on that file..

and….voila! then you should have an e-mail after you try to send it.

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