<html><head></head><body>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.<br><br>Regards<br>Frank<br><br><div class="gmail_quote">Am 8. Juni 2022 21:14:23 MESZ schrieb Jeremy Schaeffer <kb9mfd@phonesplus.biz>:<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<pre dir="auto" class="k9mail">I keep having this issue with one user, and I have to restart dovecot <br>several times a day to clear it. What I have is a postfix / dovecot mail <br>server (Centos 7) and about a dozen users. All mailboxes are imap ssl. I <br>monitor about 4 mailboxes on my computer and tablet. I use Thunderbird <br>on the computer (cache connections at 2) and K9 on the tablet, but one <br>user of the four I keep getting "Maximum number of connections from <br>user+IP exceeded" and I have the maximum at 50 <br>"(mail_max_userip_connections=50)" so its hard for me to believe I am <br>actually exceeding it unless dovecot/client is not dropping connections <br>and keeps starting new ones until it reaches the maximum, but again, <br>only for one user, even though I am monitoring 4 on the same devices. <br>Any idea how to troubleshoot this? I don't know if I should be looking <br>at dovecot or the clients, or what I need to look for. It's been going <br>on since I put this server in use over a year ago. I also have issues <br>with Outlook clients disconnecting, just outlook, is there any <br>recommended settings to make Outlook work smoother?<br><br>Thanks! - Jeremy<br><br>Config -<br><br># 2.2.36 (1f10bfa63): /etc/dovecot/dovecot.conf<br># OS: Linux 3.10.0-1160.11.1.el7.x86_64 x86_64 CentOS Linux release <br>7.9.2009 (Core)<br># Hostname: ***<br>auth_mechanisms = plain login<br>debug_log_path = /var/log/dovecot_debug.log<br>first_valid_gid = 500<br>last_valid_gid = 600<br>last_valid_uid = 600<br>listen = *<br>mail_location = maildir:~/Maildir<br>mbox_write_locks = fcntl<br>namespace inbox {<br> inbox = yes<br> location =<br> mailbox Drafts {<br> special_use = \Drafts<br> }<br> mailbox Junk {<br> special_use = \Junk<br> }<br> mailbox Sent {<br> special_use = \Sent<br> }<br> mailbox "Sent Messages" {<br> special_use = \Sent<br> }<br> mailbox Trash {<br> special_use = \Trash<br> }<br> prefix = INBOX.<br> separator = .<br>}<br>passdb {<br> driver = pam<br>}<br>pop3_uidl_format = %f<br>protocols = imap lmtp<br>service auth {<br> unix_listener /var/spool/postfix/private/auth {<br> group = postfix<br> mode = 0660<br> user = postfix<br> }<br>}<br>service imap-login {<br> inet_listener imap {<br> port = 143<br> }<br> inet_listener imaps {<br> port = 993<br> ssl = yes<br> }<br> process_min_avail = 1<br> service_count = 0<br>}<br>service imap {<br> process_limit = 1024<br>}<br>service lmtp {<br> unix_listener lmtp {<br> mode = 0666<br> }<br>}<br>ssl = required<br>ssl_cert = <***<br>ssl_cipher_list = ECDHE-RSA-CHACHA20-POLY1305:ALL:!LOW:!SSLv2:!EXP:!aNULL<br>ssl_key = # hidden, use -P to show it<br>ssl_prefer_server_ciphers = yes<br>userdb {<br> driver = passwd<br>}<br>protocol imap {<br> mail_max_userip_connections = 50<br>}<br><br></pre></blockquote></div><div style='white-space: pre-wrap'><div class='k9mail-signature'>-- <br>Diese Nachricht wurde von meinem Android-Mobiltelefon mit K-9 Mail gesendet.</div></div></body></html>