While trying to send a message with Thunderbird via SMTP over a secured connection (SSL), I got this neat little message:
SSL received a record that exceeded the maximum permissible length. (code: ssl_error_rx_record_too_long)
At first, I thought there was something wrong with my mailserver. So I reinstalled the certificates and everything. No change. 
So, as always: Google to the rescue! I found a few descriptions of that error, but none of the tipps for resolving did the trick for me.
Shortly before I was ready to give up on the secure connection (which I hate to do!), I found a tip that helped me.
I turns out, that Thunderbird gives you that error, when your user-credentials are wrong!
So changing my username in the settings to the correct one did the trick. Hope this helps someone out some time.
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