this package seems to have new commits in its VCS but has
not yet updated debian/changelog. You should consider updating
the Debian changelog and uploading this new version into the archive.
Here are the relevant commit logs:
Author: Scott Kitterman <firstname.lastname@example.org>
Date: Sun Feb 16 01:50:18 2020 -0500
Update postfix.postinst text to refer to systemctl vice service