$ openssl s_client -starttls smtp -connect example.com:25

On Fri, Jun 25, 2021 at 03:55:51PM +0100, Simon Harrison wrote:
> From what I can gather, SPF and DKIM are in the mail headers. What is
> an easy way to check that TLS is working correctly? I have the
> following in my /etc/stmpd.conf
> 
> listen on eth0 tls pki example.com
> 
> Thanks
> 
> -- 
> Web: https://simonh.uk
> Email: [email protected]
> 
> 

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