Email Authentication Failed Error Message

I have tried to set up email access to one of my addresses in both Thunderbird and Mailbird using POP settings.

When the programs try to connect the return message is "mail.comcast.net responded: [AUTH] Authentication failed."

Previously the Mailbird account would receive but not send. I removed the account at Mailbird's suggestion and now it will not receive or send.

The Mailbird program has a connection TEST button and the connection fails, authentication again.

This failure began when Xfinity required me to change passwords a short while ago. Since then the connections have been NG,

I have double checked the input and it is ok. The same password will sign into Xfinity so I know that the password is good

Accepted Solution

2 Messages

10 months ago

Nevermind,

I stumbled on a solution.

Yet again replaced the comcast password and set outside email program accounts to IMAP using the new password.

Odd that POP3 doesn't work any longer.

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1 Message

8 months ago

Have similar problem when I had to reset a password because Xfinity was hacked and breached. And once recently when I'd forgot my new password.

I run Debian 12 and Thunderbird for email and use POP3. I have 3 Xfinity email accounts. The default would send emails but not receive them.

It had been changed from POP3 to IMAP and I couldn't seem to get it back to POP3 manually.

The other 2 accounts seemed to wotk ok as they were not the default account.

Xfinity Support was basically useless. All the did was pass the buck around form one chat to another. That was when I could even get connected with a

real Live Chat!

What worked for me to change the IMAP to POP3 was to move all the local emails from the problem account to Local Folder, and then remove the

problem default account. Then use Thunderbird's automatic email connection tool to re-setup the POP3 account.

For good measure I changed the default account to one of the other accounts since I use it more often to send emails.

Within a few minutes of reinstalling/reconnecting the problem account, the emails started being received on the problem account.

This might not be exactly the problem you had, but I think it is related to when a password has to be reset, for

"security reasons" the account gets set to to IMAP. And I haven't found an easier way get the account back to POP3.

Hope this helps

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