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Command error. 12

  • 4 replies
  • 29 have this problem
  • 10028 views
  • Last reply by Toad-Hall

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I receive in the upper right edge the whole day some strange message The current operation on (e.g.) "Inbox" [or also other folders] did not succeed. The mail server for the account XXX responded: Command error. 12 The functionality of Thunderbird does not seem to be affected. Thus, is it a hoax meassage or something serious, since it comes and goes without any regularity...? Somebody who knows what this stupid error message means? Nothing can be found in any of the help files or webpages of Mozilla support. Thanks a lot

Chosen solution

TRy this:

Tools > Options > Advanced > General tab or Menu icon > Options > Options > Advanced > General tab

click on 'config editor' button. it will tell you to be careful :)

In top search type: send_client look for this line: mail.server.default.send_client_info; Value = true

Double click on that line to toggle TRUE to FALSE It will stop Thunderbird from sending the "ID command". the error seems to be happening with some servers that claim to support that command but return an error when it is used.

Close window - top right X click on OK Restart Thunderbird.

Please retest and report back on results.

Read this answer in context 👍 18

All Replies (4)

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That error typically indicates a problem with your email provider's server, or a connectivity issue. Have you checked with your email provider?

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Well I am waiting for a reply from the provider sitting somewhere in the university. That dept is apparently working on some system upgradings as they anounced last week but are not ready yet. Perhaps they know what they create as funny error messages...I hate numbered error messages in general which make you feel more than stupid... Thanks again.

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Chosen Solution

TRy this:

Tools > Options > Advanced > General tab or Menu icon > Options > Options > Advanced > General tab

click on 'config editor' button. it will tell you to be careful :)

In top search type: send_client look for this line: mail.server.default.send_client_info; Value = true

Double click on that line to toggle TRUE to FALSE It will stop Thunderbird from sending the "ID command". the error seems to be happening with some servers that claim to support that command but return an error when it is used.

Close window - top right X click on OK Restart Thunderbird.

Please retest and report back on results.

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Not sure if this applies, but I also located this: https://support.mozilla.org/en-US/questions/1027811

This solution worked, but setting the preference as per my previous comment did not work. So, this persons issue may have different to yours even though it produced the same error.

Modified by Toad-Hall