Version 1.05.00-1 of filtermail is marked for autoremoval from testing on Thu 09 May 2024. It depends (transitively) on bobcat, sendmail, affected by #1066420, #1068068, #1068325, #1068327. You should try to prevent the removal by fixing these RC bugs.
Problems while searching for a new upstream version
high
uscan had problems while searching for a new upstream version:
In debian/watch no matching files for watch line
https://gitlab.com/fbb-git/filtermail/tags \/fbb-git\/filtermail\/-\/archive\/[\d.]*\/filtermail-([\d.]*)\.tar\.gz