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Comcast Mail Relays Blacklisted

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Comcast Mail Relays Blacklisted

Since 4/16/2018, comcast smtp relays are being added to blacklists.  So far, I've seen the following IPs blacklisted:

You can see the relevant blacklists using mxtoolbox:

This, of course, means that it is impossible to send email to recipients that use these blocklists (e.g. sourceforge).  Please fix.  Thanks.



Re: Comcast Mail Relays Blacklisted

You need to call Comcast security for anything related to blocking issues----------------------------


Comcast Customer Security Assurance-------------------

Normal business hours (6:00 am to 2:00 am EST, 7 days a week)

1 - 888-565-4329

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