Server.app recieves mail and saves to INBOX, but client does not receive mail
Mountain Lion Server rookie, so forgive my ignorance please.
Here are some details:
DNS at the registriar has an A record (mail.mydomain.com) pointing to my public IP and an MX record pointing to mail.mydomain.com
Server is a MacMini, Mountain Lion clean install, V10.8.2, all software updated
DNS on MacMini server has Primary Zone of mydomain.com with an A record (mail.mydomain.com) pointing to my private IP (behind my router) and an MX record pointing to mail.mydomain.com
Cable modem with no NAT and all ports open.
Router is a Time Capsule V7.6.2 with all appropriate ports open for mail.
Client is an Mountain Lion (updated from Lion) OS, v?, all software updated
Apple Mail setting - IMAP account, incoming server: mail.mydomain.com, username and password are same as server user account, outgoing server: server.mydomain.com.
My problem: all devices (MBP and iPad) sync with the server for drafts and sent folders (haven't checked junk and trash yet), but I get nothing sent to the inbox. I have tried mailing myself from inside and outside my network, no go. The mail log on the server shows activity for the user account, and states the inbound mail is saved to the users INBOX, but the clients never receive the mail. The connection doctor on the MBP client shows successful logins to both the incoming and outgoing servers.
I have been scouring the internet for any clues for help and haven't been able to find anyone with this specific problem. Is there anyone out there that might be able to provide some guidance?
MacBook Pro (17-inch Late 2011), OS X Mountain Lion (10.8.2)