Mailing List Message #105860
From: Alastair Burr <>
Subject: Re: HEADS UP: If you're queueing to Office365 domains (was Re: Error: none of client TLS cipher methods is supported)
Date: Fri, 30 Oct 2015 13:00:49 +0000
To: CommuniGate Pro Discussions <>

We had exactly the same problem sending to emails hosted behind . We raised this with CommuniGate support, and they suggested we add: "--SMTPOutgoingTLSVersion 2" to our SUPPLPARAMS in the script to ensure outgoing mail attempted to use TLS v1.1 as per:

For us this is with "CBC Ciphers for old TLS" disabled and "Weak Ciphers" disabled. We run 6.1.5 on linux x86_64.


On 30/10/15 02:23, Bill Cole wrote:
Disabled: cannot send to MS-hosted domains at all, because * machines drop the connection abruptly during TLS setup after the client_hello is sent.

Alastair Burr
Senior Technical Architect, Bluestar Software
Telephone: +44 (0)1256 882695
Web site:

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