I just upgraded two servers from ISPConfig 2.2.5 to 2.2.6 without any problems. So that's good!
On these Debian 3.1 servers, I have no .vacation.cache file in the /var/www/web1/user/userid directory either.
I have the following situation:
When i send an email from an emailaddress from a domain on my server to the mailbox with the autoresponder enabled, the autoresponder works as it should be.
When i send an email from a domain which is NOT on my server, the autoresponder does not function:
The message is bounced back with a Postfix message: Domain name required for sender address test (in reply to MAIL FROM command)
I think the MTA does not look to the whole emailadres like email@example.com
but only to username. The MTA can not find the username (of course) because it is an emailaddress outsite my server.
How, can i fix this problem?