[Dovecot] Sieve Vacation for redirected email

I posted this elsewhere, but under an old post. I apologize for the repeated question.

Hello Dovecot Users,

Dovecot 2.1.7

Our emails are redirected from the home office causing all vacation responses to fail with, "discarding vacation response for implicitly delivered message; no known (envelope) recipient address found in message headers". I need to use the Sieve Vacation option but cannot figure out how to get it working for us. If I send to the local address, it works fine.
If I send to the redirect address, it fails with above error.
Unfortunately, all of our emails are redirects from a single domain. There's got to be some way to make it work. Any help would be greatly appreciated, Dave

Stephan Bosch-2 wrote

• Vacation extension: finally added support for using the original recipient in vacation address check. It is also possible to disable the recipient address check entirely. Check doc/vacation.txt for configuration information.