On 23 Jun 2021, at 11:58, [email protected] wrote: > The mail server is an old Postfix(2.9.6)/Cyrus(2.4.16) stack. > > I access emails from 4 different Thunderbird clients using either VPN or SSH > port forwarding which gives up to 8 combinations in total. > > When switching I often see: > > "Unable to connect to your IMAP server. > You may have exceeded the maximum number of connections to this server. > If so use the Advanced IMAP Server Settings dialog to reduce the number of > cached connections." > > I have already tried reducing the maximum number of server connections to > cache from 5 to 1 across all clients and waited 24 hours before reconnecting > but the issue didn't go away. > > My question: where do I find an option to slightly increase the limit on > server side and what is it called? > > I've already looked into cyrus.conf, imapd.conf and few other places but > couldn't find any obvious setting.
It is possible to limit the number of IMAP process in /etc/cyrus.conf. Do you
have any lines with “maxchild=“?
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