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IMAP users cannot login from baya as well as Outlook
- Symptoms :
1. Normally users are able to login but at peak time the imap users cannot login to baya or Outlook. 2. /var/log/maillog contains lot of 'Input/output error' at the time when users are not able to login.
- Solution :
Stop courier-authlib service.
In /etc/authlib/authdaemonrc, change
daemons=10 to daemons=25
Start courier-authlib service.