Xfinity Email Settings: Comcast.net IMAP, POP and SMTP
The IMAP, POP and SMTP settings Xfinity publishes for Comcast.net email — and the setting you have to turn on before any email app will connect.
Quick answer
Xfinity Email (Comcast) server settings
- IMAP Incoming SSL/TLS
-
imap.comcast.netport 993
- SMTP Outgoing STARTTLS
-
smtp.comcast.netport 587
- POP3 Download SSL/TLS
-
pop3.comcast.netport 995
- Username
- Your full Comcast.net email address
- Password
- Your Xfinity ID password
- Before you start
- Turn on third-party access: Xfinity Email › Settings › Security
- Alternative SMTP port
- 465 (SMTPS)
- Not supported
- Port 25 and POP port 110
To read Comcast.net email in Outlook, Apple Mail, Thunderbird or your phone’s mail app, you need Xfinity’s server settings — and you need to switch on third-party access first. Skip that step and the app shows an error, however correct the settings are.
Step 1: Turn on third-party access
- Sign in to Xfinity Email with your Xfinity ID and password.
- Click the gear icon at the top right, then Settings.
- Click Security.
- Under Third Party Access Security, check the box to allow third-party programs.
If you already used an email app, the box is checked by default. Unchecking it only stops apps from being set up — it doesn’t change how you receive email.
Step 2: Enter the server settings
| Server | Port | Security | |
|---|---|---|---|
| Incoming (IMAP) | imap.comcast.net | 993 | SSL on |
| Outgoing (SMTP) | smtp.comcast.net | 587 (or 465) | TLS (SSL if TLS isn’t offered) |
| Incoming (POP) | pop3.comcast.net | 995 | SSL |
- Username: your full Comcast.net email address.
- Password: your Xfinity ID password. Sending mail requires it too.
- IMAP fallback: if 993 won’t connect, Xfinity lists port 143 with SSL on. If your app asks for an authentication method for IMAP, Xfinity says to choose STARTTLS.
- SMTP fallback: port 465 (SMTPS) if 587 doesn’t work.
Ports that no longer work
- Port 25 isn’t supported for sending, for security and spam reasons. Older programs such as Outlook Express, older Outlook or Mac Mail may have trouble until you change it.
- POP port 110 is no longer supported — use 995. Check your app’s Settings, Advanced Settings or Preferences.
IMAP or POP?
Xfinity recommends IMAP. It keeps your mail and folders on the server, so changes sync across your phone, tablet and computer. POP removes mail from the server as it downloads, which causes problems if you use more than one device.
A word on safety
Xfinity warns that third-party programs could expose your Xfinity ID and password to fraud, and that they can read, download and delete your email. If you only use the website, leave third-party access off. If an app stops sending, recheck the outgoing settings above — Xfinity lists that first.
Prefer not to type these in? The Email Settings Finder shows them for any address. Signing in on the web instead: Xfinity Email login.
How this guide was checked · October 2026
Verified against 2 official sources
Every step, setting and limit in this guide was checked against the provider’s own documentation on xfinity.com. Anything we couldn’t confirm was left out.
Questions
Frequently asked questions
What is the Comcast IMAP server?
imap.comcast.net on port 993 with SSL on. Xfinity lists port 143 with SSL as a fallback.
What is the Comcast SMTP server?
smtp.comcast.net on port 587, or 465 (SMTPS) if needed. Port 25 isn’t supported.
Why won’t my email app connect to Comcast.net?
Third-party access may be off. Turn it on in Xfinity Email under Settings › Security › Third Party Access Security, then try again.
Does Comcast still support POP3 port 110?
No. Use pop3.comcast.net on port 995 with SSL.
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