dovecot Digest, Vol 230, Issue 21

[Joseph Tam]

On Thu, 9 Jun 2022, Richard wrote:


> Rather than simply upping the limit I think a reasonable question to

> ask is why/how they are managing to do that. That's a lot of open

> folders.


If this mail client behaves anything like Apple mail clients, these

connection storms can come about when doing global searches.  The mail

clients will march through each mailbox (opening a connection for each

mailbox) looking for a pattern.


If you can narrow this scenario for one specific user (e.g. $user), you

can deep dive what's going on by enabling IMAP session logs for this user


        protocol imap {

                ...

                rawlog_dir = /log/dir/%u

        }


then


        (Make sure this user has write permissions into this directory)

        mkdir /log/dir/$user


After you're done, you can disable logging,


        rm -rf /log/dir/$user


Joseph Tam <jtam.home at gmail.com>