A server I’m responsible for used to be able to use Roundcube / Filter to do a Vacation notice.
Now it seems the same rules don’t work.
Even a simple “Refuse mail with error message” seems to work, no new mail turning up, but no error message is being sent either.
It seems the filter can’t send anything anymore. No error messages to be seen, either in mail or roundcube logs (At least those shown in the WebInterface).
Removed Roundcube (And with that my mail!) and reinstalled it after a reboot.
Still not working, and no errors shown.
I tested “Reply with message” and “Discard with message” but I couldn’t reproduce the error, both works.
Maybe it helps to create a new filter in roundcube and activate it?
Does it work locally on Nethserver to get the vacation notice from another user?
Do you use a smarthost? Maybe there’s a problem with outgoing mails.
Did you see the vacation message in maillog?
cat /var/log/maillog | grep vacation
May 26 21:14:09 server2 dovecot: lmtp(b@b.c): 6DrsdgdsgsdgAAArAzIVg: sieve: msgid=<1c29sdlkjjdofj9348458608ae811ad65@c.local>: sent vacation response to <a@b.c>