[exim] gnutls-handshake

Hello,

Im trying to bring up a new exim4 server on my machine.
I run debian (testing) and thus used apt-get install exim-daemon-heavy.
I created my own CA certificate and self signed the exim.crt
and exim.key files.

A colleage of mine keeps randomly generating this error:

2004-12-09 13:28:35 TLS error on connection from blah.my.domain
(gnutls_handshake): A TLS fatal alert has been received.

but if he tries to send the message again, it works.

Any help would be appreciated!

David