Comcast was founded in 1963 and has two primary businesses: Comcast Cable and NBC Universal. Over the past 50 years, Comcast increased its business footprint in the U.S. and is the largest U.S. cable provider with more than 25 million email subscribers.
Infrastructure
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Region |
North America; U.S. |
|
Domains |
Comcast.net |
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Connection/throughput |
Suggested mail transfer agent (MTA) settings for IPv4 and IPv6 addresses:
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Feedback loop (FBL) application |
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Postmaster site |
Validity partnership with Comcast
In partnership with Validity, Comcast uses Validity Certification for preferential treatment to Comcast email customers. Comcast also uses your sending reputation based on Validity’s Sender Score and authentication results to determine your rate limit.
Comcast delivery mediation
Comcast has a public escalation process to remove blocks.
Validity guidance
Validity understands Comcast well and may have data to diagnose deliverability issues.
