Quote Originally Posted by JulinaB View Post
Much the same with my ancient system which hasn't had it's postfix configuration touched this year.

Cumulus:~ # ls -al /etc/postfix/can*
-rw-r--r-- 1 root root 13194 Feb  2 15:13 /etc/postfix/canonical
-rw-r--r-- 1 root root 12288 Feb  6 02:31 /etc/postfix/canonical.db
Suspect they maybe rebuilt when some updates are installed. At least my .db mod dates are after the mod dates of base text file which yours are not but your .lmdb files do show a later modification date. So did you change from using 'hash' to 'btree' file formats?
Never touched it. Maybe a bug since an update in the beginning of Feb?