Hello everybody. Sorry my first post here is a request for information, but I'm going crazy trying to solve a problem with postfix and have run out of ideas. For information, the FQDN of my site is luna.lowcarbon.com. I've followed all the instructions here:
http://library.linode.com/email/postfix ... -6-squeeze
but, when I send email from my site (e.g., when my mediawiki installation tries to send login details to users), I get the following in /var/log/mail.log:
May 1 18:21:13 luna postfix/smtp: 5B8C07404E: to=<PERSON@SOMEDOMAIN.com>, relay=SOMEDOMAIN.com[18.104.22.168]:25, delay=0.07, delays=0/0.01/0.03/0.02, dsn=5.0.0, status=bounced (host SOMEDOMAIN.com[22.214.171.124] said: 550-Verification failed for <email@example.com> 550-The mail server could not deliver mail to firstname.lastname@example.org
. The account or domain may not exist, they may be blacklisted, or missing the proper dns entries. 550 Sender verify failed (in reply to RCPT TO command))
So it seems the site I'm sending to tries to ping back to see if the sender (email@example.com
) exists, presumably as an anti-spam measure. Using the instructions in the Linode link above, I think I have created a mail user in MySQL called firstname.lastname@example.org
(they're certainly visible in /home/vmail/luna.lowcarbonuk.com/www-data) but this hasn't solved the problem.
If anybody has any advice on what I might do now I'd be really grateful as I'm tearing my hair out!