Warning: this is higly experimental!
Debian removed squirrelmail in stretch because of the dependency to php5. I packaged the current devel versions of squirrelmail and avelsieve. I took the opportunity to add some plugins (compatibility, quicksave and sent_confirmation). I used the last debian package description from jessie for building the packages and make shell scripts to update them and build the packages.
- Avelsieve: build_avelsieve.sh Downloads avelsieve from svn.
Squirrelmail: build_squirrelmail.sh Downloads squirrelmail from svn.
Additionally needed files (into org directory):