Initial build of Exchange 2013 SP1
IPS: Comcast
To date:
Change outbound SMTP port from 110 to 587 for Comcast
Established Comcast as smart host
Setup internal receipients as user@mydomain.com in mail flow default policy. Since Comcast blocks inbound port 25, I have a mailhop and MX records set to forward on port 2525
Ports forwarded to exchange IP
IMAP 143
POP3 110
SMTP 25
Comcast 587
SSL 993
Mailhop 2525 to 25
I can successfully send a eMail to an external domain eMail address and it shows coming fromuser@mydomain.com. If I reply or send an eMail touser@mydomain.com, it does not come through. It comes back to sender as undeliverable. One bounce back had a full session trace. I see it picked up by the mailhop at the MX of mydomain.com. From what I can see, it got sent to router. The message I see is Recipient address rejected: undeliverable address: User unkown. I cannot validate that it was presented on port 2525 and sent over to 25 then exchange. However, the rejection seems to indicate that Exchange rejected it.
What am I missing to connect to the recipient mailbox?
John
John Lenz