[exim] GnuTLS: what could exim prevent from sending its cert…

Hello,

just a simple question, as in the subject:

    What/who(?) could exim prevent from sending its TLS certificate?

The receiving side justs doesn't get the cert, doesn't matter if
the receiving side is configured for hosts_try_verify_certificate or
for hosts_verify_certificate.

Despite that missing transferred cert the TLS stuff is working.

Any ideas?

    Best regards from Dresden
    Viele Grüße aus Dresden
    Heiko Schlittermann
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