@Gnettinger 

Thanks for reaching out. I understand that you are having trouble accessing your Comcast/Xfinity email when connected to your Deco Mesh Wi-Fi network, but it works fine when you switch to mobile data. This issue affects multiple devices in your home, and your Gmail works without any problems.

Here are some steps you can follow to troubleshoot this issue:

1. Check if the issue is related to your Internet Service Provider (ISP):
• For webmail access: Disconnect the main Deco from your modem and connect your PC directly to the modem. Try accessing your Comcast/Xfinity email. If you still can't access it, the issue might be with your ISP.
• For email apps: Temporarily reconnect your old router to the modem and see if the problem persists. If the issue only occurs with Deco, continue with the next steps.

2. Ensure there are no VPNs or network proxies enabled on your PC or phones, as these can sometimes interfere with email access.

3. Change the DNS server settings in the Deco app:
• Open the Deco app and go to MORE > Internet Connection.
• Change the DNS server to 1.1.1.1 or 8.8.8.8.
• After updating the DNS, reconnect your devices to the Deco network to make sure the new settings take effect.

4. Check the Antivirus or Real-Time Protection features in the Deco app:
• Sometimes, these features may block access to certain services or websites. Review the history in the Antivirus or Real-Time Protection section to see if your Comcast/Xfinity email is being blocked.

5. Review Parental Control settings:
• Make sure there are no content filters or website blocks that could be affecting your email access.

If you follow these steps and the problem continues, please let us know the results of each step so we can assist you further.