Am 18.02.19 um 12:04 schrieb Viktor Dukhovni:

> diff --git a/src/tls/tls_misc.c b/src/tls/tls_misc.c
> diff --git a/src/tlsproxy/tlsproxy.c b/src/tlsproxy/tlsproxy.c

Hello Viktor,

I confirm these modifications fix the delivery failure.

... $ sendmail -f sen...@example.org -bv recipi...@gervers.com

Feb 18 19:09:26 mail postfix/tlsproxy[10971]: CONNECT to [5.9.100.168]:25
Feb 18 19:09:26 mail postfix/tlsproxy[10971]: Verified TLS connection 
established to sys1.mmini.de[5.9.100.168]:25: TLSv1.2 with cipher 
ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)
Feb 18 19:09:26 mail postfix/smtp[10969]: Verified TLS connection established 
to sys1.mmini.de[5.9.100.168]:25: TLSv1.2 with cipher 
ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)
Feb 18 19:09:26 mail postfix/tlsproxy[10971]: DISCONNECT [5.9.100.168]:25
Feb 18 19:09:29 mail postfix/smtp[10969]: 443Bhj6rYCzyC: 
to=<recipi...@gervers.com>, relay=sys1.mmini.de[5.9.100.168]:25, delay=4, 
delays=0.1/0.04/0.47/3.4, dsn=2.1.5, status=deliverable (250 2.1.5 Ok)
Feb 18 19:09:29 mail postfix/cleanup[10975]: 443Bhn6tnBzyS: 
message-id=<443bhn6tnb...@mail.example.org>
Feb 18 19:09:30 mail postfix/bounce[10972]: 443Bhj6rYCzyC: sender delivery 
status notification: 443Bhn6tnBzyS
...


> These address missing DANE and TLS library initialization in the
> TLS proxy.  Another issue remains, in that tlsproxy(8) wants
> unconditional server-side support before it is willing to be a
> client proxy, and therefore also wants server certificates.

that's limitation I currently could tolerate :-)

Thanks!
Andreas

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