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My Thunderbird will not connect to Comcast/Xfinity email account

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My Thunderbird will not connect to the Comcast/Xfinity email account with the same settings that Outlook connected to and downloaded all my emails and my inbox structure. I believe this is either a battle between Comcast and Thunderbird or a big glitch in this application, My Gmail, Outlook365, work fine in Thunderbird, not Comcast. This started about a week ago. Has anyone found a solution?

My Thunderbird will not connect to the Comcast/Xfinity email account with the same settings that Outlook connected to and downloaded all my emails and my inbox structure. I believe this is either a battle between Comcast and Thunderbird or a big glitch in this application, My Gmail, Outlook365, work fine in Thunderbird, not Comcast. This started about a week ago. Has anyone found a solution?

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Are you using an Apple device? I found this long conversation that describes similar to what you describe. Only Apple device users seem to be affected. There are a number of suggested fixes, but it's not clear to me if any of them are the one true magic bullet.

https://forums.xfinity.com/conversations/email/apple-device-email-clients-not-working-with-comcastnet-accounts/6913dbb2ed2c3f53707a1ee9

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