Hey all. Recently my ISP (Spectrum) decided (after this was working for
me for almost 20 years) to make it impossible for a self hosted domain
to relay through their SMTP server unless it was actually a spectrum.com
email address being used. After going back and forth with them to try
to find a workaround, I had to give up and look elsewhere. My next stop
was with dnsexit.com.
Despite following their FAQ on postfix setup
(http://www.dnsexit.com/support/mailrelay/postfix.html), I kept getting
the dreaded 454, Relay access denied error message when attempting to
send. I verified all of my settings with their support but still
couldn't relay through them, even though I had working settings
previously for Spectrum (mail.twc.com).
Finally, I setup an account with smtp2go.com, jumped through their hoops
to set up various cname records for my domain, and once that was done, I
was able to relay a test email through them on the first try. So,
everything seemed to point to some issue with the dnsexit folks.
My question for the list is, is anyone here relaying via dnsexit.com,
and if so, did you have similar issues that got resolved? I'd rather
use their service if possible as they are currently handling my dynamic DNS.
My settings
main.cf:
relayhost = [relay.dnsexit.com]:587
smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd
smtp_sasl_auth_enable = yes
smtp_sasl_security_options =
And my sasl_passwd file (and yes, I did do a postmap after my changes)
relay.dnsexit.com:587 myusername:mypassword
And finally, what was logged here:
Jun 21 14:39:11 localhost postfix/smtp[191554]: 3F46E412E057: host
relay.dnsexit.com[64.182.102.186] said: 454 4.7.1 <t...@example.com>:
Relay access denied (in reply to RCPT TO command)
Jun 21 14:39:12 localhost postfix/smtp[191554]: 3F46E412E057:
to=<t...@example.com>, relay=relay.dnsexit.com[64.182.102.185]:587,
delay=78570, delays=78569/0.04/1.2/0.12, dsn=4.7.1, status=deferred
(host relay.dnsexit.com[64.182.102.185] said: 454 4.7.1
<t...@example.com>: Relay access denied (in reply to RCPT TO command))
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