Emails are not received and quaranteened on a new version 115 but work well on 102.15.1
Ever since the update to 115.8 I have not been able to send emails to a hospital since it Quaranteens emails at the server lever sent from thunderbird and they are not received by the recipient. I have downgraded to version 102.15.1 and the emails go through
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I have a sneaking feeling that the issue will be the the user agent: header as that has been changed to offer less information between V102 and 115.
Use the config editor to change the setting in 115 to mailnews.headers.useMinimalUserAgent to false
The bug report the change was implemented on https://bugzilla.mozilla.org/show_bug.cgi?id=1114475 and the somewhat sneaky way of changing the default in another bug when no one was looking. https://bugzilla.mozilla.org/show_bug.cgi?id=1809356 so the change was force fed to everyone, not just those that cared.
Can you please report your results back here