Windows 10 已于2025年10月14日停止支持。如果您正在使用 Windows 10,参见 这篇文章。

Windows 10 reached EOS (end of support) on October 14, 2025. If you are on Windows 10, see this article.

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Error message below appears when sending email. However,Email sends okay on second attempt.

TOB1

Tried compacting and clearing history, but neither worked.

Sending of message failed. Unable to open the temporary file C:\Users\Terry\AppData\Local\Temp\nsmail.tmp. Check your 'Temporary Directory' setting.

Tried compacting and clearing history, but neither worked. Sending of message failed. Unable to open the temporary file C:\Users\Terry\AppData\Local\Temp\nsmail.tmp. Check your 'Temporary Directory' setting.

所有回复 (6)

What is your anti-virus s/w?

My anti-virus is McAfee.

Exclude your Thunderbird profile folder from being scanned by McAfee. More information in this article.

https://wiki.mozilla.org/Thunderbird:Testing:Antivirus_Related_Performance_Issues#McAfee

No, the article didn't seem to solve the problem.

Of the three suggestions in the article, I was able to : 1. Disable McAfee Anti-Spam Thunderbird Extension 2. Disable email attachment scanning

But unable to find in McAfee: 3. Disable scanning of Thunderbird files and folders

Try this :- http://kb.mozillazine.org/Cannot_send_mail

This may help you . Let us know if this work !

由user669794于修改

You'll need to create an exception in McAfee for your Thunderbird profile folder. To find your profile folder:

AppMenu button - Help - Troubleshooting Information - Profile Directory - Open Directory