Re: [courier-users] Re: Unexpected SSL connection shutdown?

[Gordon Messmer]

Sam Varshavchik wrote:
Kevin Murphy writes:
STARTTLS failed: Unexpected SSL connection shutdown.


courieresmtpd diagnostic: the connecting client issued a STARTTLS, but 
then abruptly terminated the connection.

Verify that your SSL/TLS configuration is working:

addcr | TLS_VERIFYPEER=NONE couriertls -host=localhost -port=25 
-protocol=smtp


You can also get good diagnostics out of openssl:

openssl s_client -connect mail.example.com:465 \
        -CApath /usr/lib/courier/share/rootcerts
See if it can verify your cert, and if not, make sure that the CN in the 
cert matches the hostname that you're using to connect to it.



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