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Problem sending with TLS
I have The Bat! v4.0.38 which I have been using successfully for years. However, my email provider now requires TLS handshake and I am no longer able to send messages. The server uses Postfix and Dovecot.

I have tried both TLS and START TLS.

I either get "Message has not been sent. Server reply - 5.7.1 Client host rejected: cannot find your hostname" or "TLS protocol error: Unexpected message SessionUnknownContentType ct (50)"

Can anyone help? I have double and triple checked all the settings and passwords. I have installed Thunderbird and can send mail through that.

Does this version of The Bat! have the right TLS to work with Postfix and Dovecot or will I need to upgrade to v6?

I hope someone can help.
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