After Plesk upgrade to 9.5.4, imapd on port 143 did not come up.
On checking the maillog, it was complaining about:
imapd: Invalid -maxprocsarg option.
imapd-ssl: Invalid -maxprocsarg option.
I noticed /etc/courier-imap/imapd had both the below lines commented:
#MAXDAEMONS=40
#MAXPERIP=4
Once I uncommented those values, I was able to get the imap listener up upon a `service courier-imap restart`.
Command Line 9.x Upgrades to 9.5.4
We used the command line to upgrade all of our Plesk 9.x to 9.5.4 and did not experience this problem at all, which upgrade method did you use?
We used the following:
/usr/local/psa/admin/bin/autoinstaller –select-release-id=PLESK_9_5_4 –upgrade-installed-components –ignore-key-errors –notify-email=your@emailaddress.com
We do edit that files to increase MAXDAEMONS to 120 and MXPERIP to 12.