When I delete messages with POP3, the change doesn't get replicated.
To reproduce: run the pop3 server from the command line, type this to it:
DELE 1 QUIT
This correctly deletes the first message on the local server, but it does not send a replication notify message.
Poking around a bit with gdb, it appears that the pop3 server decides incorrectly that the changes it is making are not worth notifying about. It is hard to find something that doesn't happen, and I would appreciate suggestions for further debugging this case.
I do get the expected replication when new mail arrives and also when I manipulate my mailbox with IMAP.
I have tested this with Dovecot 2.3.7.2 (on Ubuntu 20.04) and with the git HEAD, 2.3.14+. What may be the same bug was reported on this list last August against Dovecot 2.3.8, but it got no reply then.
My mail store is on a local ext4 file system. I have replication enabled in my configuration:
$ doveconf mail_plugins mail_plugins = mail_crypt notify replication $ doveconf -f protocol=pop3 mail_plugins mail_plugins = mail_crypt notify replication