Here’s a quick fix for the “Remote host said: 554 too many hops, this message is looping (#5.4.6)” error message you might get when trying to send an e-mail to an e-mail address configured in PLESK on a GoDaddy Linux VPS running Qmail.
- SSH Into your GoDaddy VPS
- Copy the file located at
/var/qmail/control/smtproutesto/var/qmail/control/smtproutes.old - Open the file located at
/var/qmail/control/smtproutes - Delete its contents
I believe this will only work if you’re not using GoDaddy to host any of your e-mail and you only want your VPS and PLESK (running Qmail) to be responsible for hosting your e-mail.
More information and the original fix can be found here: http://www.datapencil.com/horde.htm