[Exim] which certificate for exim/TLS

Hello list,

I am running exim 3.3x with TLS and I am using a self signed certificate.
But can sb. give me input
- which certificate i have to buy for use with exim
AND
- where to buy such a correctly signed certificate

Thanks for your reply.

Thomas.

--
Thomas Baumann // tirili+list.exim@???

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