/var/ax25/ is in fbb 7.04j-8.2ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/var/ax25/fbb/
/var/ax25/fbb/binmail/
/var/ax25/fbb/binmail/mail0/
/var/ax25/fbb/binmail/mail1/
/var/ax25/fbb/binmail/mail2/
/var/ax25/fbb/binmail/mail3/
/var/ax25/fbb/binmail/mail4/
/var/ax25/fbb/binmail/mail5/
/var/ax25/fbb/binmail/mail6/
/var/ax25/fbb/binmail/mail7/
/var/ax25/fbb/binmail/mail8/
/var/ax25/fbb/binmail/mail9/
/var/ax25/fbb/docs/
/var/ax25/fbb/fbbdos/
/var/ax25/fbb/fbbdos/yapp/
/var/ax25/fbb/log/
/var/ax25/fbb/mail/
/var/ax25/fbb/mail/mail0/
/var/ax25/fbb/mail/mail1/
/var/ax25/fbb/mail/mail2/
/var/ax25/fbb/mail/mail3/
/var/ax25/fbb/mail/mail4/
/var/ax25/fbb/mail/mail5/
/var/ax25/fbb/mail/mail6/
/var/ax25/fbb/mail/mail7/
/var/ax25/fbb/mail/mail8/
/var/ax25/fbb/mail/mail9/
/var/ax25/fbb/oldmail/
/var/ax25/fbb/sat/
/var/ax25/fbb/wp/