Plesk upgrade removes webmail
This morning I did an upgrade on my plesk server to 8.2.1. This mostly went ok, but the main problem afterwards was that webmail was no longer working for domains.
Instead webmail.domain was redirecting to the default domain on that box. The solution is to rebuild the web server config files with the following command:
/usr/local/psa/admin/sbin/websrvmng -a -v
Credit for this solution goes to poster on plesk forums…