[sork] Vacation / Forward with virtual domain Postfix

[postfixml]

Hello sork list,

I would like use some horde modules like vacation and forward.

Of course I think I can't use dot forward in home directory because I 
use virtual domain :

/var/spool/mail/domain.tld/user1/Maildir
/var/spool/mail/domain.tld/user2/Maildir
/var/spool/mail/domain.tld/user3/Maildir

/var/spool/mail/domain2.tld/user1/Maildir
/var/spool/mail/domain2.tld/user2/Maildir
/var/spool/mail/domain2.tld/user3/Maildir

I can use this too :

/var/spool/mail/user1 at domain.tld/Maildir
/var/spool/mail/user2 at domain.tld/Maildir
/var/spool/mail/user3 at domain.tld/Maildir
/var/spool/mail/user1 at domain2.tld/Maildir
/var/spool/mail/user2 at domain2.tld/Maildir
/var/spool/mail/user3 at domain2.tld/Maildir

etc...

The owner of this folder is vmail.


How use vacation or forward module like this ?


Maybe a solution is to use a sql backend who add and remove virtual alias
see :
http://www.postfix.org/VIRTUAL_README.html#autoreplies

example :
  
user1 at domain.tld ---->  user1 at domain.tld, 
user1 at domain.tld@autoreply.mydomain <postconf.5.html#mydomain>.tld


Thanks for your help

Sylvain