Novell GroupWise 2014 R2
After upgrading to GroupWise 2014 R2, the native Mac Mail client doesn't show new items for a very long time or until you quit and restart Mac Mail.
This has been reported to engineering. A new GroupWise 2014 R2 FTF in conjunction with setting the --imapreadlimit for the post office agent to something greater than 40,000 seems to help but is not yet a complete fix.
Apple has changed the way that the Mac Mail client determines if there is new mail. They are using the IMAP STATUS call, when the IMAP RFC says that a NOOP command or a re-SELECT of the mail box should be used. Based on this we are trying to code a way around this so customers will not have to close and restart the Mac Mail client.