Comcast Email Not Showing Up in Gmail? Two Separate Changes Are Colliding

If your comcast.net mail has stopped turning up in Gmail, there are two separate changes rolling out at the moment, and you may have been hit by either, or both at once. Comcast is moving Xfinity Email onto Yahoo's platform, which changes the server and password Gmail was using to fetch your mail. And Google is removing the Gmail feature that did the fetching. The fix depends on which one has reached you, so start by working out where your mailbox actually is.

Has your mailbox moved to Yahoo yet?

Since June 2025, Comcast has been inviting comcast.net users to move their mailbox to Yahoo Mail, in waves rolling out through 2026. The invitation arrives by email and when you sign in at connect.xfinity.com, and nothing moves until you accept it.¹ Your address stays @comcast.net either way.¹

The reliable way to check whether yours has moved is to try signing in at login.yahoo.com with your full @comcast.net address. If Yahoo recognises the address, your mailbox is on Yahoo now; if it says it doesn't recognise it, you haven't been moved yet and you keep signing in through Xfinity.² One caution while all this is going on: fake "your email is moving" messages are circulating, enough that Comcast has a page warning about them, so don't follow links in an unexpected migration email; go to xfinity.com or yahoo.com directly.³

This matters because the POP3 settings are different on each side. The pre-migration values below are from Xfinity's client settings page⁴ and the post-migration ones from Yahoo's page for moved comcast.net accounts.² As of mid-2026:

Two Comcast-specific catches. Before migration, POP3 only works if the box under "Third Party Access Security" is ticked in Xfinity Email settings (the gear icon, then Settings, then Security). Comcast added that checkbox in 2020, and it's unticked by default unless you were already using an outside mail program at the time; while it's off, every outside client fails to sign in, Gmail included.⁵ After migration, your normal password generally stops working for POP3: you generate an app password from the Yahoo account security page (under "External connections") and use that in its place.² If your Gmail fetch broke with a password error right around the time you accepted the Yahoo move, this is why. And if POP still won't authenticate after that, Yahoo's IMAP server (imap.mail.yahoo.com, port 993) with the same app password is the fallback its own guides push.²

The other change: Gmail is losing the fetcher

Even with the right settings, the Gmail side is going away. "Check mail from other accounts", the setting that pulled your Comcast mail into Gmail, is being removed. Google's support page says new setups stopped being supported after the first quarter of 2026 and existing ones run until January 2027,⁶ but its own in-Gmail banner warned of early January 2026 and people have reported connections stopping at various points since, so treat the 2027 date as a ceiling. I've written up the full timeline separately. If your Comcast fetch has stopped and no password change explains it, this is likely the reason, and re-entering the settings won't bring it back.

Keep the mailbox alive while you're at it

Comcast's email activity policy requires the account to be used at least once every 24 months, through webmail or a third-party mail program, or it's treated as inactive; since January 2025, inactive accounts are closed after a 90-day run of warnings, and a closed account's contents are not recoverable.⁷ Gmail's fetcher counted as use, which cuts both ways: once it stops fetching and you don't notice, the clock starts running with nothing to reset it. Comcast also stopped creating new comcast.net addresses in June 2024, so if you lose this one you can't get another.⁸ Worth signing in to the webmail directly now and then whatever else you do.

Keeping comcast.net mail in Gmail

Forwarding is the free option, with a deadline attached. Before migration you can turn on Auto Forward in Xfinity Email settings.⁹ But Comcast's own FAQ says forwarding settings don't move to Yahoo and forwarding stops when your mailbox is upgraded,¹ and on Yahoo's side automatic forwarding needs the paid Mail Plus plan (free forwarding was discontinued back in January 2021).¹⁰ So the free route closes when your wave hits. Forwarding also only handles new mail, and forwarded messages sometimes get caught by Gmail's spam filter because they arrive from Comcast's servers rather than the original sender.

The Gmail mobile app can read the account over IMAP with the settings above. That works fine on your phone, but the mail never appears in the Gmail web inbox, which for most people is the whole point.

The closest thing to what "Check mail from other accounts" did is to have something log into the mailbox on a schedule and import the mail into Gmail for you. That's the gap I built PopRelay to fill. You give it the POP3 details from the table above (including the app password, if your mailbox has moved to Yahoo), pick how often it should check, and it pulls anything new and adds it to your Gmail using the Gmail API. There's no forwarding relay in the middle, so the spam-filter headaches don't apply, it only ever asks Google for permission to add messages and labels, and your password is encrypted before it's stored. It's from the same people behind 33mail.com, which has been running since 2011.

If that sounds right, you can set it up in a few minutes. Either way, sort something out before the fetcher reaches its end date, and sign in to the mailbox directly now and then so the 24-month clock never becomes your problem.

Sources

1. Xfinity, "Upgrade your Comcast.net email to Yahoo Mail", accessed 3 July 2026.
2. Yahoo, "Information for Xfinity Comcast.net email accounts moving to Yahoo Mail", accessed 3 July 2026.
3. Xfinity, "Stay safe during the Yahoo Mail upgrade", accessed 3 July 2026.
4. Xfinity, "Set up Xfinity Email in an email client program", accessed 3 July 2026.
5. Xfinity, "Allow access to your Xfinity Email from third-party programs", accessed 3 July 2026.
6. Google, "Learn about upcoming changes to Gmailify & POP in Gmail", accessed 3 July 2026.
7. Xfinity, "Xfinity Email activity policy", accessed 3 July 2026.
8. Xfinity, "Xfinity Email accounts", accessed 3 July 2026.
9. Xfinity, "Auto Forward in Xfinity Email", accessed 3 July 2026.
10. Yahoo, "Automatic email forwarding discontinued for free accounts", accessed 3 July 2026.