mail program issue

Astarr2023 wrote:

MAIL program sometimes inadvertently will not send a message. I turned off the delayed send, in the preferences, and that didn't seems to work. The message that pops up, after multiple messages were sent, is CANNOT SEND MESSAGE... "The attempt to read data from the server failed." The crazy things is... I am successfully able to send emails from any address in mail, and this message pops up every so often for no reason whatsoever. When I Close the Mail program and then open it back up, and then send that same email, it works. I have to continue to shut down the mail, during the day, at various times, because this message pops up every so often, which is annoying. This issue was never a problem on any other MacBook Pro that I used in the past. How can I fix this?

verify your software is up to date…

The current stable release of Ventura including bug fixes, security updates is macOS Ventura 13.5

Keep your Mac up to date - Apple Support

Keep your Mac up to date - Apple Support

You can try quitting mail and relaunch it holding the Shift key down and compare your results.

You can try A SafeBoot Use safe mode on your Mac - Apple Support will sort many anomalies

Reboot as normal and test. Caches get rebuilt automatically.

you can file a bug report /submit your Apple Feedback here: Feedback - Mail - Apple