Sender address when notifying original recipient

[Christoph Pleger]

Hello,

I am using sieve with notification of the original recipient in the case
that an email has been identified to contain a virus. After upgrading
dovecot from 2.2.21 to 2.2.29.1, I now detected that in these
notifications, their sender address is now <postmaster@>, instead of
<postmaster at mailserver.domain>, like it was before.

Is it possible to revert to the old format?

Regards
  Christoph