Apple device email clients not working with comcast.net accounts

Hello @user_fqm3v6 I am sorry to hear that the Apple mail is having issues with your Comcast emails. So we can better assist you can you provide the exact wording of the error message you are receiving? We appreciate you confirming that the steps you've taken so far.

In regard to the switch to Yahoo. We cannot manually begin that process for accounts. You will receive an email when it is your turn to make the switch. We are migrating the email accounts over to Yahoo in groups through the end of 2026. So it sounds like your grouping has not started yet. 

Same issue. 

What is the story. This needs to be fixed. As i am still waiting for this so called email to change to yahoo. I no problem with the change. The problem is comcast has stutdown all third email access. This not the right way to go about this. Please offer a solution for this issue as we wait for this email that no one seems to know when it is coming.

@kevdanc - Thank you for leaving a comment regarding your similar concerns. You are in the right place! Our team will always do whatever it can to help as many customers as possible :) Here are some key troubleshooting steps:

1. Address the "Temporarily Blacklisted IP Address"
The "blacklisted IP" message is a common report from Xfinity customers using third-party clients, especially when they travel or use a new network. It means our security system is temporarily blocking your current network's public IP address from connecting to the email server.

- If you are at home (using your Xfinity Wi-Fi):

Restart your modem and router. Unplug them both, wait one minute, plug the modem in first, wait until it's fully online, and then plug the router in. This often forces your ISP (us) to assign you a new public IP address. Once you have a new IP, your email clients may connect immediately.

- If you are traveling or not using Xfinity Internet:

The block is almost certainly because of your non-local IP. We have an internal process to clear this block, but you usually have to speak with our Customer Security Assurance Team directly.

2. Verify IMAP/SMTP Server Settings
Even when auto-configuration fails, manually re-entering the settings can sometimes correct a subtle error. Please check and manually enter these exact settings on one of your Mac or iPhone accounts to be sure.

Account Type: IMAP (Recommended)
Incoming Mail Server: imap.comcast.net
Incoming Port (IMAP): 993 (with SSL/TLS enabled)
Outgoing Mail Server: smtp.comcast.net
Outgoing Port (SMTP): 587 (with SSL/TLS or STARTTLS enabled)
Authentication: Password
Username: Your full comcast.net email address
Password: Your Xfinity email password

Mac Mail Specific Check: In Mac Mail Preferences, under Server Settings for your account, make sure "Automatically manage connection settings" is unchecked for the Outgoing Mail Server (smtp.comcast.net), and then manually ensure the port is 587 and "Use TLS/SSL" is checked.

3. Consider an App-Specific Password (Less Common for Comcast)
While primarily a Google/Apple/Yahoo feature, some older security changes at Xfinity may cause the mail client to reject your main password for security reasons. Although you mentioned changing the password, this step is worth verifying as a secondary layer of security:

- Check your Xfinity Account Security: Log into your Xfinity account on the web. Look for settings related to "App Passwords" or "Third-Party App Access Security."

- Action: If there is an option to generate an "App-Specific Password" or similar, generate one and use that password instead of your main Xfinity password when setting up the account on your Apple Mail clients.

Summary of Action Plan
1. Restart your modem and router to attempt to get a new public IP address (Most likely fix for the "blacklisted IP" error at home).

2. If the IP change doesn't work, or you are not at home, call our Security Assurance Team at 1-888-565-4329 and ask them to unblock your current public IP address.

3. Manually delete and re-add one account on a Mac or iPhone, making sure to use the exact manual settings (Port 993 for IMAP, Port 587 for SMTP, with SSL/TLS).

I used Summary of Action Plan #3, and uninstalled my xfinity mail account from my iphone. Then I added the xfinity mail account back to my phone and it fixed the problem. 

I was having the same issue, when I travel from WA to SC my xfinity mail accounts gives me the error message "IMAP password prompt" and won't load new mail. 

Having to delete and reinstall all of your email is a pain, but it fixed my problem. Xfinity needs to make it easier to fix this problem.

Hi @genman Thank you for reaching out on the Xfinity Community Forums. Have you attempted the steps in troubleshooting listed below by my awesome colleague?

Hello Comcast,

There seems to be an issue with the IMAP Server network connectivity. It's on your end. Comcast.net email domains are having trouble being added to IOS. I am not sure if a breach has taken place. However, I tried every single recommended step, including but not limited to: deleting and re-adding the account, changing server ports, removing IMAP, my Comcast security settings allow integration with other apps and services and Comcast's site links to troubleshoot this issue. https://www.xfinity.com/support/articles/pop-imap-iphone.

Please, look into this issue immediately and restore the email service on our IOS devices.

Thank you for your help.

Caroline

Same issue and results here. Typical Xfinity service. Break it and then tell customers it’s their issue. 

Noopur Davis’ team needs to look into this and fix this issue for thousands of Comcast customers as soon as possible.