Issue with one user only, exceeding connections

[Frank-Ulrich Sommer]

I think if IMAP IDLE is used you need one connection per folder. If I remember correctly at least either Thunderbird or K9 Mail (I'm using both too) use one connection per selected directory. Simply increasing the number of connections was the easiest solution as I only have very few users too.

Regards
Frank

Am 8. Juni 2022 21:14:23 MESZ schrieb Jeremy Schaeffer <kb9mfd at phonesplus.biz>:
>I keep having this issue with one user, and I have to restart dovecot 
>several times a day to clear it. What I have is a postfix / dovecot mail 
>server (Centos 7) and about a dozen users. All mailboxes are imap ssl. I 
>monitor about 4 mailboxes on my computer and tablet. I use Thunderbird 
>on the computer (cache connections at 2) and K9 on the tablet, but one 
>user of the four I keep getting "Maximum number of connections from 
>user+IP exceeded" and I have the maximum at 50 
>"(mail_max_userip_connections=50)" so its hard for me to believe I am 
>actually exceeding it unless dovecot/client is not dropping connections 
>and keeps starting new ones until it reaches the maximum, but again, 
>only for one user, even though I am monitoring 4 on the same devices. 
>Any idea how to troubleshoot this? I don't know if I should be looking 
>at dovecot or the clients, or what I need to look for. It's been going 
>on since I put this server in use over a year ago. I also have issues 
>with Outlook clients disconnecting, just outlook, is there any 
>recommended settings to make Outlook work smoother?
>
>Thanks! - Jeremy
>
>Config -
>
># 2.2.36 (1f10bfa63): /etc/dovecot/dovecot.conf
># OS: Linux 3.10.0-1160.11.1.el7.x86_64 x86_64 CentOS Linux release 
>7.9.2009 (Core)
># Hostname: ***
>auth_mechanisms = plain login
>debug_log_path = /var/log/dovecot_debug.log
>first_valid_gid = 500
>last_valid_gid = 600
>last_valid_uid = 600
>listen = *
>mail_location = maildir:~/Maildir
>mbox_write_locks = fcntl
>namespace inbox {
>   inbox = yes
>   location =
>   mailbox Drafts {
>     special_use = \Drafts
>   }
>   mailbox Junk {
>     special_use = \Junk
>   }
>   mailbox Sent {
>     special_use = \Sent
>   }
>   mailbox "Sent Messages" {
>     special_use = \Sent
>   }
>   mailbox Trash {
>     special_use = \Trash
>   }
>   prefix = INBOX.
>   separator = .
>}
>passdb {
>   driver = pam
>}
>pop3_uidl_format = %f
>protocols = imap lmtp
>service auth {
>   unix_listener /var/spool/postfix/private/auth {
>     group = postfix
>     mode = 0660
>     user = postfix
>   }
>}
>service imap-login {
>   inet_listener imap {
>     port = 143
>   }
>   inet_listener imaps {
>     port = 993
>     ssl = yes
>   }
>   process_min_avail = 1
>   service_count = 0
>}
>service imap {
>   process_limit = 1024
>}
>service lmtp {
>   unix_listener lmtp {
>     mode = 0666
>   }
>}
>ssl = required
>ssl_cert = <***
>ssl_cipher_list = ECDHE-RSA-CHACHA20-POLY1305:ALL:!LOW:!SSLv2:!EXP:!aNULL
>ssl_key =  # hidden, use -P to show it
>ssl_prefer_server_ciphers = yes
>userdb {
>   driver = passwd
>}
>protocol imap {
>   mail_max_userip_connections = 50
>}
>

-- 
Diese Nachricht wurde von meinem Android-Mobiltelefon mit K-9 Mail gesendet.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://dovecot.org/pipermail/dovecot/attachments/20220608/10ead0d0/attachment.htm>