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Thunderbird started to time out, doesn't save sent email. No firewalls. Timeout set to 1000. Win 10

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For many years no problem now, suddenly, TB often says server timed out and sent email don't get saved, or I have to do a manual save. What's going on? Thanks

For many years no problem now, suddenly, TB often says server timed out and sent email don't get saved, or I have to do a manual save. What's going on? Thanks

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kelvin.jarman said

For many years no problem now, suddenly, TB often says server timed out and sent email don't get saved, or I have to do a manual save. What's going on? Thanks

Added: Just tried to send an email, I get: Your message was sent but a copy was not placed in your sent folder (Sent) due to network or file access errors. You can retry or save the message locally to Local Folders/Sent-kelvin.jarman@sky.com.

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kelvin.jarman said

kelvin.jarman said
For many years no problem now, suddenly, TB often says server timed out and sent email don't get saved, or I have to do a manual save. What's going on? Thanks

Added: Just tried to send an email, I get: Your message was sent but a copy was not placed in your sent folder (Sent) due to network or file access errors. You can retry or save the message locally to Local Folders/Sent-kelvin.jarman@sky.com.

And now this (this is a new one): Sending of the message failed. The message could not be sent because the connection to Outgoing server (SMTP) smtp.tools.sky.com was lost in the middle of the transaction. Try again.

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Are you using smtp.tools.sky.com on port 465, SSL/TLS security, authentication = normal password, and entering an app password? Do you have a security program scanning outgoing mail or SSL (secure) connections?

https://www.sky.com/help/articles/getting-started-with-sky-yahoo-mail

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Yes to all except no to security program. Incidentally, since my post, all seems well! What an effect you have!