Vacation messages only sent internally...

[Adam Katz]

How do I troubleshoot this?

Incoming mail passes through an extra relay that checks for spam
before passing on to the kolab server (so my users can still view old
mail and send new mail while somebody trashes my MX servers).  This
relay uses forwards users to the kolab server (so user at domain.com goes
to the relay, passes through spam/av filters, and is forwarded to
internal address user at kolab).  I have tested listing user at kolab as one
of the addresses in the webadmin's config to no avail.

The "Only react to mail coming from domain ____" field is empty.