The POP3 mail server does not support UIDL or XTND XLST

User Help for Mozilla Thunderbird
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Joined: March 2nd, 2017, 12:31 pm

Post Posted April 26th, 2017, 6:22 am

Thunderbird 52.0.1 has been giving me this error lately:

The POP3 mail server ( does not support UIDL or XTND XLST.

The error only seems to appear if I click on Get Messages. When I first start Thunderbird, it retrieves the messages fine. Later on, when I suspect I am no longer receiving any new messages, I click on Get Messages and the error pops up. It would appear an error occurred at some point, preventing new emails to be fetched, but no error were displayed until I pressed Get Messages.

Usually restarting Thunderbird solves the problem temporarily but eventually the problem returns. I can see all the messages fine if I log into the webmail.

I don't think the problem is with the mail server as we have 2 computers monitoring the same general email account and the error only occurs on the same computer. Both computers use Thunderbird.

Any ideas what could be causing this error?


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Post Posted April 26th, 2017, 7:14 am

Moving to Thunderbird Support.


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Post Posted April 26th, 2017, 10:33 am

The Yahoo POP server periodically has this problem. That's one of the reasons why we recommend using IMAP instead. See ... ND_or_XLST

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