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10.6.8 IMAP - Clients can't receive email

1466 Views 3 Replies Latest reply: Mar 9, 2013 5:24 PM by UptimeJeff RSS
3DM3 Calculating status...
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Mar 8, 2013 10:00 AM

I am running a IMAP mail server on Snow Leopard 10.6.8, which had been running fine for 1+ year.. It is located at my residence. Long story short, after a power outage/cable outage Comcast just decided to block port 25 on my residence which made me have to switch my SMTP port to 587. After much muddling around, I got that to go, but now clients can't recieve emails. I have turned on debug logging on the mail server, but I can't see anything to explain it. Eventually, the messages are kicked back to the sender (as a test, I sent from my mobile me account) with the following


Thu, 07 Mar 2013 22:55:56 +000 (GMT) TCP active open: No addresses found for host Error: Connection timed out.


However, I can't see any activtiy in the server side logs. DNS possibly?


Any help is GREATLY appreciated.

  • UptimeJeff Level 4 Level 4 (3,390 points)
    Currently Being Moderated
    Mar 9, 2013 5:24 PM (in response to 3DM3)

    587 is the smtp-submission port.

    Its used for clients to submit mail to the server (for delivery or relay)


    Mail sent to your server from other servers will always be on port 25.

    If your ISP is blocking port 25, you can't receive mail directly from other servers.


    You can use a reflector service to get around this


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