I am a Comcast customer with 3 computers and 3 computer users in the house. There are 2 fully updated Macs and one PC running Windows 7. We use Mail on the Macs, and Outlook on Windows 7. All computer accounts are configured to send mail through port 587 of smtp.comcast.net.
I also have two personal domains registered with Network Solutions. For the sake of this discussion, call my domains myOwnDomain1.com and myOwnDomain2.com. I have
email addresses at both domains. They are of the form
[email protected] and
[email protected].
Until recently, our
email worked as expected. However, sometime between September 13, 2012 and September 19, 2012, we lost the ability to send
email through Comcast's SMTP server to the
email addresses at my personal domains.
If we attempt to send
email through Comcast's SMTP to those addresses, the
email never arrives. Furthermore, the
email clients give no indication of failure. The
email just never arrives. The result is the same on all 3 computers and with all accounts on those computers.
We can successfully send
email through Comcast's SMTP from any of our accounts on any of our computers to any
email address other than to my
email addresses at my personal domains! However, I receive
email at those domains that is not sent through smtp.comcast.net. For example, I can successfully send
email from my gmail and yahoo accounts to my
email addresses at my personal domains. Furthermore, I can successfully send
email through smtp.myOwnDomain1.com to
[email protected] and through smtp.myOwnDoman2.com to
[email protected].
Comcast says the problem must be at Network Solutions. According to Network Solutions, their logs show they are not blocking reception of the
email, and our IP
address is not flagged as a spam source. They say the
email is simply not arriving.
Does anyone have any ideas why we can't send
email through Comcast's SMTP server to my domains?
As an odd coincidence, we recently noticed a change in Comcast's SMTP service. there is now a 5 minute delay on all outbound mail. Comcast's SMTP server seems to sit on the mail with a 5 minute timer.
