Mailing List Message #106432
From: Technical Support <>
Subject: Re: Rejected by
Date: Sat, 27 May 2017 11:13:03 +0300
To: CommuniGate Pro Discussions <>

On 2017-05-25 20:17 , James Moe wrote:
On 05/23/2017 11:50 AM, James Moe wrote:

   We recently added "--SMTPOutgoingTLSVersion 3" to cgpro's command
line, to encourage use of TLS 1.2.
   Is that a mistake?

   Wow, tough one.
   Yes, it was a mistake. After removing the option, the "Undeliverable"
messages were delivered.

Some TLS 1.2 implementations including that of require TLS extension that is marked as optional in the RFC. So CGPro did not advertise it (though supported) - this is addressed for 6.1.17 / 6.2c4.

Best regards,
Dmitry Akindinov.
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