"openssl s_client" sessions fail identically with 77.43.17.211
and 81.252.237.162.

    % openssl s_client -starttls smtp -connect 77.43.17.211:25
    ...
    250 OK
    ehlo spike.porcupine.org

Nothing happens.

    % openssl s_client -starttls smtp -connect 77.43.17.211:25
    ...
    250 OK
    mail from:<wie...@porcupine.org>

Nothing happens.

Plaintext greetings from 77.43.17.211 and 81.252.237.162 are identical
except for the hostname and time-of-day. 

I suspect a "patch Tuesday" problem.

        Wietse

220 ssifsrv01.seronosymposia.org Microsoft ESMTP MAIL Service, Version: 
6.0.3790.4675 ready at  Thu, 12 Apr 2012 14:15:21 +0200
ehlo spike.porcupine.org
250-ssifsrv01.seronosymposia.org Hello [168.100.189.2]
250-TURN
250-SIZE
250-ETRN
250-PIPELINING
250-DSN
250-ENHANCEDSTATUSCODES
250-8bitmime
250-BINARYMIME
250-CHUNKING
250-VRFY
250-TLS
250-STARTTLS
250-X-EXPS GSSAPI NTLM LOGIN
250-X-EXPS=LOGIN
250-AUTH GSSAPI NTLM LOGIN
250-AUTH=LOGIN
250-X-LINK2STATE
250-XEXCH50
250 OK
mail from:<wie...@porcupine.org>
250 2.1.0 wie...@porcupine.org....Sender OK

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