Comcast Business Internet SMTP server down - "Certificate has expired"

Apparently, at midnight GMT on June 18th, 2016, the TLS certificate use by (some of?) Comcast's SMTP servers have expired. My Business Internet service is unable to route email for my business.

The following command (on linux) confirms the issue:

openssl s_client -connect smtp.w14e.comcast.net:587 -starttls smtp

It indicates:

Verify return code: 10 (certificate has expired)

Please fix it...

Responses

VBSSP-RICH

Advocate

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1.4K Messages

8 years ago

Hello Colenmgc and welcome,

You will have to contact 800-391-3000, use high speed internet technical user option, then provide the technical agent the email Comcast address you are having trouble with and only then can Comcast resolve that email address smtp server certificate issue you mentioned.

Hope this helps you out.

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Colenmgc

New Member

•

2 Messages

8 years ago

So, after a 4 day outage due to the expired certificate, and numerous calls, they have fixed the certificate issue. However, they are now giving me:

550 5.1.0 sender rejected: invalid sender domain

.. For emails coming from MY domains, from MY Microsoft Exchange server. I've talked to so many people at Comcast, and they are completely clueless that Business Internet must include SMTP relaying. No-one I've talked to at Comcast Business Technical Support has a clue what that means. I'm lucky to get someone who knows what SMTP even is - and they immediately try to blame the email program, as if I were a user of their @mydomain.comcastbiz.net server. No thank you. Why would any business want to receive their business email @anything.COMCASTCASTBIZ.NET instead of their own domain name? Are they insane? The incompetence is overwhelming. I have never had a SPAM complaint. I only process a few messages a day, including web-site generated emails for password reset, etc. How do they expect a business to host a web site using them as their ISP? This is rediculous. I would write them, but they offer NO email access to tech support. At this point, I'd like to connect with their legal department to demand out of my service contract so I can switch to a company that can provide the minimum expected requirement for this service. This is BS.

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