Bug#459323: exim4: Incredimail problem sending email using Exim4 SMTP over SSL / TLS error on connection from [ip.ad.dr.ess] (gnutls_handshake): A TLS packet with unexpected length was received.

[Simon Josefsson]

"Andrew McGlashan" <andrew.mcglashan at affinityvision.com.au> writes:

>> If you don't see a cleartext "EHLO something", please retry with
>> openssl s_server instead of the socat.
>
> I couldn't work out how to use openssl s_server properly....

Try:

openssl s_server -accept 4465 -debug -msg

and try IM on port 4465 against it.  And also try:

gnutls-serv --port 4465 --debug 4711

/Simon