Issues with Mac mail email clients after maildir conversion


Jan 18, 2008
I am asking for some advice, our servers have now been converted over to maildir. Which, users are reporting a variety of email clients not syncing to the server, some are getting duplicate emails, Mac users are getting IMAP sync issues which I have been simply telling them to remove the account from the client and re-adding it. It does resolve the issue, but my question is this something to do with mac email clients using mbox format and once the conversion it has a fit and causes the users all kinds of grief.

On the same note, I get Mac users with pop accounts running into nearly the same issue. Which, I only advised backing up their email and then remove and re-add. I have had some that removed and didn't back the emails up which I found a handy trick through a mac forum to recover them, well I hope it worked no complaints yet.

I guess my true question is what indeed causes the email clients to act in such a manner after the conversion.

Any insight to this would be beneficial in trying to provide a much needed response to my users on how to correct this with out putting them through the ringer.

By the way, I have not had any Outlook issues yet. Just Mac users.


Technical Product Specialist
Nov 29, 2006
Houston, TX
cPanel Access Level
Root Administrator
Note, duplicate emails will be received for those acquiring their mail via POP3 after the conversion.

I know when I have sync issues with an IMAP client connecting to a cPanel server, I typically need to set the IMAP prefix to INBOX.


Well-Known Member
Sep 25, 2002
St. Charles, MO
I have a customer with a similar problem. Using Mac mail.

I see the pop3 log everything as if nothing is happening, but the customer is telling me the mailbox shows "offline" in their mail program.

Unfortunately, I have no idea about anything Mac, so I don't know what to do.

I don't see any problems in the logs on this end.

Should I tell him to set it up as imap to see if that helps, or will it make any difference? I only assume it's pop3 since thats what is being logged on the cPanel server /var/log/maillog

Jan 30 09:13:12 cpanel pop3d: LOGIN, [email protected], ip=[::ffff:]
Jan 30 09:13:13 cpanel pop3d: LOGOUT, [email protected], ip=[::ffff:], top=3087, retr=43408, rcvd=55, sent=62523, time=1



Staff member
Mar 9, 2015
cPanel Access Level
DataCenter Provider
They may just need to click the little lightning image next to their mail or restart

You can hit


to find the status of whats going on