IMAP Mail Problem with Mac Mail

[warrenrk]

Recently upgraded to Plesk Panel 9.2.1 (from 8.0) and immediately had a problem with the IMAP accounts. Mac Mail is producing the following error;

**************
The server error encountered was: The attempt to read data from the server mail.smilinghill.com failed.
**************

I have restarted qmail and rebooted but problem remains. Should I be rebuilding a file/database somewherer? Is there a setting change I need to institute? Any help would be appreciated.

Thanks in advance.

 

[warrenrk]

Problem Solved

Discovered an incompatibility with mail.app and the default settings for courier-imap in Plesk Panel 9.2.1

The MAXDAEMON and MAXPERIP settings for imapd in the /etc/courier-imap/ directory needed to be adjusted up.

There is a detailed account of this on the Apple Support Forum
http://discussions.apple.com/thread.jspa?threadID=1213918

The default setting for MAXPERIP is 4 in Plesk and the mail.app will attempt to use 5 connections in IMAP to facilitate a speedy retrieval and sync of the requisite mail folders. Guaranteed conflict every time.