Xfinity Email works in any mail app that speaks IMAP. Incoming mail (IMAP): imap.comcast.net, port 993 (SSL/TLS). Outgoing mail (SMTP): smtp.comcast.net, port 587 (STARTTLS). The user name is your full email address, and the password is your Xfinity ID password. In LocalInbox, choose Other IMAP account and type these in under Server settings.
Xfinity is inviting comcast.net users to move their mailbox to Yahoo Mail, through 2026. Once yours has moved, Xfinity says to set mail apps up with Yahoo Mail's settings instead: https://localinbox.app/guides/yahoo
Server settings
| Server | Host name | Port | Security |
|---|---|---|---|
| Incoming (IMAP) | imap.comcast.net | 993 | SSL/TLS |
| Outgoing (SMTP) | smtp.comcast.net | 587 | STARTTLS |
| Outgoing (SMTP), other port | smtp.comcast.net | 465 | SSL/TLS |
| Incoming (POP3) | pop3.comcast.net | 995 | SSL/TLS |
For comcast.net addresses. Xfinity no longer supports port 25 for sending, or port 110 for POP3.
What the ports and security mean: IMAP ports and SMTP ports.
POP3 is for apps that use it. LocalInbox uses IMAP, so read, moved and deleted mail stays the same on every device: POP3 and IMAP compared.
Steps
- Sign in to Xfinity Email, click the gear icon and choose Settings › Security. Check the box under Third Party Access Security, so mail apps can connect.
- In LocalInbox, open Settings › Accounts and click Add Account (or use the welcome screen the first time).
- Choose Other IMAP account. Enter your Xfinity address, and your Xfinity ID password as the password.
- Open Server settings. Under Incoming mail (IMAP), enter imap.comcast.net and port 993, and choose TLS.
- Under Outgoing mail (SMTP), enter smtp.comcast.net and port 587, and choose STARTTLS.
- Leave User name empty, and LocalInbox signs in with your full address, which is what Xfinity expects.
- Click Connect. LocalInbox signs in and starts syncing your mail.
Troubleshooting
LocalInbox says the password is wrong
LocalInbox needs your Xfinity ID password. Copy it again, without spaces before or after.
LocalInbox says it can't connect
The message says what to fix: nothing answering at the port, the wrong kind of TLS for the port, an untrusted certificate, an unknown server name, or a timeout. Check what you typed under Server settings against the table at the top of this page.
Mail comes in, but sending fails
Some networks block port 587. Xfinity also takes port 465 with SSL/TLS: change it under Server settings › Outgoing mail (SMTP).
Sources
Xfinity Email's settings were checked against its own help pages in November 2026 and can change. The steps in LocalInbox come from the app.
Questions
What are the Xfinity Email IMAP and SMTP settings?
Incoming (IMAP): imap.comcast.net, port 993, SSL/TLS. Outgoing (SMTP): smtp.comcast.net, port 587, STARTTLS. Outgoing (SMTP), other port: smtp.comcast.net, port 465, SSL/TLS. For comcast.net addresses. Xfinity no longer supports port 25 for sending, or port 110 for POP3.
My comcast.net mailbox moved to Yahoo Mail. Which settings now?
Yahoo Mail's. Xfinity says to add the account again in your mail app with your new Yahoo Mail details. The Yahoo Mail guide has Yahoo's servers and how to make an app password: https://localinbox.app/guides/yahoo
Where does LocalInbox keep the password?
In the macOS Keychain on your Mac. It's never written to a file or sent anywhere except your mail server.
What are the Xfinity Email POP3 settings?
Incoming (POP3): pop3.comcast.net, port 995, SSL/TLS, for apps that use POP3; outgoing mail goes through the same SMTP server as with IMAP. LocalInbox uses IMAP instead, which keeps read, moved and deleted mail the same in webmail, on your phone and on your Mac. POP3 downloads mail to one device.
Can I add Xfinity Email on iPhone or iPad?
Yes, the same way, in LocalInbox for iPhone and iPad: Settings › Accounts › Add Account, then Other IMAP account. Type in the same server settings and password. Already added it on your Mac? Add Account › From your Mac copies it with a QR code, password included. https://localinbox.app/iphone