exim4 needs gnutls expertise
exim4, sarge's default MTA, uses gnutls for the obvious license reasons. However, gnutls does seem to have issues of interoperability, which have manifested themselves in a list of bugs, most prominently being #297174, which we are at a loss to debug.
Neither Andreas nor me have the knowhow to debug gnutls, and Upstream uses openssl - the gnutls patch was contributed and the author of the original patch doesn't seem to be around any more.
Can anybody help?