thunderbird sieve certificate issues

[Marc Grober]

I have thunderbird sieve extension connecting to my mail server, but the extension then advises that the server is requiring a certificate. Though I have a number of Thawte email certs none of them will of course be accepted and the extensions say they are unable to establish an encrypted connection. What is causing this and what can I do about it? Is the server looking for a public key? Does anyone having this running also being asked for a cert? I looked and played with OCSP. And it seems I can get the server to quit asking for a cert but then it just hangs there saying "Connecting". Is the certificate just a red herring?

smime.p7s
Description: S/MIME Cryptographic Signature

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