Re: [exim] debugging tls handshake failure

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Author: Kirill Miazine
Date:  
To: exim-users
Subject: Re: [exim] debugging tls handshake failure
• Julian Bradfield via Exim-users [2022-11-21 21:41]:
> I should like to know what's happening here:
>
> 2022-11-21 21:10:42 TLS error on connection from r218.notifications.rbs.co.uk [130.248.154.218] (gnutls_handshake): A TLS fatal alert has been received.


I see similar on a number of systems, and would be interested if you
manage to find a solution.

2022-11-22 09:30:27 TLS error on connection from smtp-outgoing-1803.laposte.net [160.92.124.104] (gnutls_handshake): A TLS fatal alert has been received.
2022-11-22 09:41:06 TLS error on connection from smtp-outgoing-1601.laposte.net [160.92.124.96] (gnutls_handshake): A TLS fatal alert has been received.

There are lots of them, and also from worldline.com and some other from
time to time.

The certificate on this particular host is issued by Buypass and entire chain is sent along.

> However, I can't see how to get any more information. I've tried
> setting
> add_environment = GNUTLS_DEBUG_LEVEL=3
> in the exim4 config file, but it doesn't appear to do anything.
>
> Is there a way to get more information?