Emails not being delivered!!!

[tutt]

The email system on my Plesk 8.0 (CentOS 4) server seemed to work fine until it went live. No emails seem to get lost in space. Nothing shows up in the spool files at /var/qmail/mailnames/xxx.com/user/Maildir/new, and this is what I see in the mail log when trying to send an email from a remote server:

Jun 21 02:18:00 dedicated relaylock: /var/qmail/bin/relaylock: mail from 64.191.93.88:44218 (64-191-93-88.hostnoc.net)
Jun 21 02:18:00 dedicated relaylock: /var/qmail/bin/relaylock: mail from 64.191.93.88:44263 (64-191-93-88.hostnoc.net)
Jun 21 02:18:00 dedicated relaylock: /var/qmail/bin/relaylock: Unable to connect to the mysql database, relay will work in closed mode & white list will not work
Jun 21 02:18:00 dedicated relaylock: /var/qmail/bin/relaylock: mail from 64.191.93.88:44236 (64-191-93-88.hostnoc.net)
Jun 21 02:18:00 dedicated relaylock: /var/qmail/bin/relaylock: mail from 64.191.93.88:44225 (64-191-93-88.hostnoc.net)
Jun 21 02:18:00 dedicated relaylock: /var/qmail/bin/relaylock: mail from 64.191.93.88:44227 (64-191-93-88.hostnoc.net)
Jun 21 02:18:01 dedicated relaylock: /var/qmail/bin/relaylock: mail from 64.191.93.88:44259 (64-191-93-88.hostnoc.net)
Jun 21 02:18:01 dedicated relaylock: /var/qmail/bin/relaylock: Unable to connect to the mysql database, relay will work in closed mode & white list will not work
Jun 21 02:18:01 dedicated relaylock: /var/qmail/bin/relaylock: mail from 64.191.93.88:44226 (64-191-93-88.hostnoc.net)

 

[crnunez]

Does this trouble only appear with one domain?

 

[jhuedder]

Do you use SPF?

 

[tutt]

Wasn't using SPF and it was not happening on the other domain on the server. I did get it fixed. I removed the listing of the particular domain from some file in /var/qmail/control where the other (working) domain did not appear. This I believe fixed the problem. I do not remember which file it was exactly.