Showing posts with the label comcast

APRF: A New Standard for Deliverability Feedback

There's a very exciting new proposed email specification making its way through the IETF, called APRF (Aggregate Performance Reporting). The individual draft specification comes from Alex Brotman of Comcast, Tom Corbett of Iterable, and Emil Gustafsson of Google. And Comcast is already live with a beta version of this feedback. If you want to read the full spec doc, you can find it here …
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Yahoo Mail to absorb Comcast subscriber mailboxes

Starting in June 2025 and continuing into 2026, Comcast's Xfinity email service is transitioning to a new platform . Email users with comcast.net addresses will begin moving over to Yahoo Mail, which will take on the role of hosting those accounts going forward. Users will …

Sending to Comcast? Be aware!

July 13, 2025 Update: As Comcast is in the first steps of outsourcing their consumer mailbox hosting, moving all subscribers' email service over to Yahoo Mail, going forward, Yahoo Mail's rules will apply. Want to learn more? Here is more info on the transition , and he…

Comcast moving to p=quarantine DMARC policy

Comcast is updating the DMARC policy for comcast.net, the domain used for Comcast Xfinity customer mailboxes. You may recall that Comcast has a number of domains , but that it ultimately boils down to comcast.COM addresses (and subdomains) are for employees and company purposes…

Comcast: No more outdated TLS for inbound mail

Comcast is eliminating the ability to encrypt inbound email connections with old and insecure versions of TLS. On May 20, 2024, Alex Brotman from Comcast  shared the following on the Mailop list : Over the next few weeks, we're going to be disabling TLSv1/v1.1 inbound to ou…

Did you notice that new Comcast bounce?

Deliverability folks from a few different email sending platforms have mentioned seeing a new bounce from Comcast, in response when trying to mail certain comcast.net subscribers: 550 5.2.0 <xxxxxxxx@comcast.net> - Account Closed, Please Remove What does it mean? Nobody h…

Ask the Expert: Alex Brotman, Senior Engineer, Comcast

Twilio Sendgrid's Denis O'Sullivan recently put together this great Q&A With Alex Brotman from Comcast , and it provides stellar insight for senders. No secret sauce will be leaked here today, but there's great knowledge here to help people sending emails unders…

Comcast email addresses: .com or .net?

Here's an ever perplexing question (and one that results in a lot of traffic to my blog): Do Comcast email addresses end in .com or .net? Is it comcast.com or comcast.net? Am I aliversonchicago@comcast.com or aliversonchicago@comcast.net? Comcast has live email addresses at…

BIMI ISP Status June 2022 (with forthcoming Apple support!)

It's time for another BIMI update, and this time it's chock full of new details that you'll want to know! So let's get right to it. The Authindicators Working Group (the folks behind the BIMI spec) have just indicated that Apple plans BIMI support!  The informa…

BIMI: ISP Support as of January 2022

It's time for your periodic BIMI adoption status update.  A quick overview of what this is all about: BIMI  is a standard  being adopted by multiple internet services providers (ISPs) to allow the display of a sender's logo along side email messages, when displayed on a…

Reference: Comcast Email Domains

Hey! I know that people find the ISP domain guides useful, so I thought I'd fire up the blog machine to share info about our friends at American telecommunications company Comcast (Xfinity) and their various email domains. I'm not sure that everybody knows this informa…

Comcast.net has new sending IP addresses

American multinational telecommunications conglomerate Comcast , most well-known to us Internet users here in the US as the provider of cable modem-based internet service Xfinity, has announced that they'll be sending outbound mail from subscribers via new (additional) IP a…

BIMI: ISP Support as of August 2021

It's been a while since I've posted a BIMI status update, and things are changing! Things are standardizing! Things are getting good. So, let's get right to it...

Howto: Forward email automatically

A simple tip for you today: If you ever switch up your email address, especially if you decide to change which service you use for your personal email inbox, you might want to configure things so that mail sent to your old email address is forwarded to your new email address au…

Is 2020 the year of BIMI?

You might notice that in my " 2020: What's next? " post, I didn't mention BIMI . BIMI, aka Brand Indicators for Message Identification, is the new way to specify what logo or brand avatar a sender wants shown alongside their email messages. ( Learn more abou…

Comcast’s Impressive System for Notifying Infected Users

Return Path's J.D. Falk reports on Comcast's efforts to let customers know when their home computers are infected: Pushing infectees into walled garden, redirecting them to a page warning them that their network connection is infected. J.D. Writes: "As one of the w…

The E360 Pantsing Continues

Laura Atkins writes today about the newly discovered settlement between 'email marketer' E360 and Comcast: "Today, only weeks before the trial date, a settlement agreement was filed. The settlement agreement prohibits the defendants and any group associated with th…

E360 Gets an Important Bit Wrong

I have a cold, which leaves me lacking energy and lacking the desire to do anything beyond sit on the couch and read. Read what, you might ask? Why, read the updates in the ongoing Amish rake fight between E360 and the entire world , of course. Right now I'm reading E360&…

E360: EPIC FAIL CONTINUES

E360 (who is also fighting Spamhaus in court) just saw their lawsuit against Comcast laughed out of court. The judge in this case really seems to be savvy on the issues involved. Third sentence in: "Some, perhaps even a majority of people in this country, would call [E…

e360 v. Comcast: EPIC FAIL

Mickey Chandler says: " EPIC FAIL ." Another blogger (I'm not going to help his Google-fu by linking) states that he "hates to say it," but that Comcast's motion "looks like a winner." Hates to say it? You've got somebody suing over w…