Hello, When trying to send an email to a server which works with Microsoft Exchange I receive the following message: Cannot start TLS: handshake failure
Nov 30 14:43:58 smarthost04-ded postfix-out/smtpd[31559]: 0F6EE920CBC: client=localhost[127.0.0.1] Nov 30 14:43:58 smarthost04-ded postfix-out/cleanup[31560]: 0F6EE920CBC: warning: header Received: from smarthost04-ded.dattaweb.com (localhost [127.0.0.1])??by smarthost04-ded.dattaweb.com (Postfix) with ESMTPS id 0F6EE920CBC??for <fvid...@exchange.infoauto.com.ar>; Mon, 30 Nov 2020 14:4 from localhost[127.0.0.1]; from=<fvid...@infoauto.com.ar> to=< fvid...@exchange.infoauto.com.ar> proto=ESMTP helo=< smarthost04-ded.dattaweb.com> Nov 30 14:43:58 smarthost04-ded postfix-out/cleanup[31560]: 0F6EE920CBC: warning: header Received: from sd-1465396-l.dattaweb.com ( sd-1465396-l.dattaweb.com [138.219.43.209])??by smarthost04-ded.dattaweb.com (Postfix) with ESMTPS id C30CB920E6B??for <fvid...@exchange.infoauto.com.ar>; Mon from localhost[127.0.0.1]; from=<fvid...@infoauto.com.ar> to=< fvid...@exchange.infoauto.com.ar> proto=ESMTP helo=< smarthost04-ded.dattaweb.com> Nov 30 14:43:58 smarthost04-ded postfix-out/cleanup[31560]: 0F6EE920CBC: warning: header Received: from [209.85.221.41] (helo=mail-wr1-f41.google.com)??by sd-1465396-l.dattaweb.com with esmtps (TLSv1.2:ECDHE-RSA-AES128-GCM-SHA256:128)??(Exim 4.92.2)??(envelope-from <santiago.videla@gmail. from localhost[127.0.0.1]; from=< fvid...@infoauto.com.ar> to=<fvid...@exchange.infoauto.com.ar> proto=ESMTP helo=<smarthost04-ded.dattaweb.com> Nov 30 14:43:58 smarthost04-ded postfix-out/cleanup[31560]: 0F6EE920CBC: warning: header Received: by mail-wr1-f41.google.com with SMTP id i2so17320655wrs.4? for <fvid...@infoauto.com.ar>; Mon, 30 Nov 2020 09:43:53 -0800 (PST) from localhost[127.0.0.1]; from=< fvid...@infoauto.com.ar> to=<fvid...@exchange.infoauto.com.ar> proto=ESMTP helo=<smarthost04-ded.dattaweb.com> Nov 30 14:43:58 smarthost04-ded postfix-out/cleanup[31560]: 0F6EE920CBC: warning: header From: Santiago Videla <santiago.vid...@gmail.com> from localhost[127.0.0.1]; from=<fvid...@infoauto.com.ar> to=< fvid...@exchange.infoauto.com.ar> proto=ESMTP helo=< smarthost04-ded.dattaweb.com> Nov 30 14:43:58 smarthost04-ded postfix-out/cleanup[31560]: 0F6EE920CBC: message-id=< caba6nqkhpp89zigz5xj_oid9rv4abi--8dhz6bzg3y3tz9w...@mail.gmail.com> Nov 30 14:43:58 smarthost04-ded postfix-out/cleanup[31560]: 0F6EE920CBC: warning: header Subject: Re: Consulta INFOAUTO from localhost[127.0.0.1]; from=<fvid...@infoauto.com.ar> to=<fvid...@exchange.infoauto.com.ar> proto=ESMTP helo=<smarthost04-ded.dattaweb.com> Nov 30 14:43:58 smarthost04-ded postfix-out/cleanup[31560]: 0F6EE920CBC: warning: header X-Spam-Report: Spam detection software, running on the system "eternia14",? has NOT identified this incoming email as spam. The original? message has been attached to this so you can view it or label from localhost[127.0.0.1]; from=<fvid...@infoauto.com.ar> to=< fvid...@exchange.infoauto.com.ar> proto=ESMTP helo=< smarthost04-ded.dattaweb.com> Nov 30 14:43:58 smarthost04-ded postfix-out/qmgr[31287]: 0F6EE920CBC: from=< fvid...@infoauto.com.ar>, size=55840, nrcpt=1 (queue active) Nov 30 14:43:58 smarthost04-ded postfix/smtp[31558]: C30CB920E6B: to=< fvid...@exchange.infoauto.com.ar>, relay=127.0.0.1[127.0.0.1]:10026, delay=0.4, delays=0.22/0/0.04/0.14, dsn=2.0.0, status=sent (250 2.0.0 Ok: queued as 0F6EE920CBC) Nov 30 14:43:58 smarthost04-ded postfix-out/smtp[31323]: 0F6EE920CBC: Cannot start TLS: handshake failure Nov 30 14:43:58 smarthost04-ded postfix-out/smtp[31323]: 0F6EE920CBC: to=< fvid...@exchange.infoauto.com.ar>, relay=exet02.hostmar.com[200.58.120.69]:25, delay=0.16, delays=0.14/0/0.03/0, dsn=4.7.5, status=deferred (Cannot start TLS: handshake failure) posttls-finger -c -Ldebug "exet02.hostmar.com" posttls-finger: initializing the client-side TLS engine posttls-finger: setting up TLS connection to exet02.hostmar.com[200.58.120.69]:25 posttls-finger: exet02.hostmar.com[200.58.120.69]:25: TLS cipher list "aNULL:-aNULL:HIGH:MEDIUM:+RC4:@STRENGTH:!aNULL" posttls-finger: SSL_connect:before/connect initialization posttls-finger: SSL_connect:SSLv2/v3 write client hello A posttls-finger: SSL_connect error to exet02.hostmar.com[200.58.120.69]:25: lost connection # Postfix config mail_version = 3.5.2 smtpd_use_tls=yes smtp_use_tls=yes smtpd_tls_mandatory_protocols = !SSLv2, !SSLv3, !TLSv1, !TLSv1.1 smtpd_tls_protocols = !SSLv2, !SSLv3, !TLSv1, !TLSv1.1 smtp_tls_mandatory_protocols = !SSLv2, !SSLv3, !TLSv1, !TLSv1.1 smtp_tls_protocols = !SSLv2, !SSLv3, !TLSv1, !TLSv1.1 smtp_tls_exclude_ciphers = EXP, MEDIUM, LOW, DES, 3DES, SSLv2 smtpd_tls_exclude_ciphers = EXP, MEDIUM, LOW, DES, 3DES, SSLv2 tls_high_cipherlist = kEECDH:+kEECDH+SHA:kEDH:+kEDH+SHA:+kEDH+CAMELLIA:kECDH:+kECDH+SHA:kRSA:+kRSA+SHA:+kRSA+CAMELLIA:!aNULL:!eNULL:!SSLv2:!RC4:!MD5 smtp_tls_ciphers = high smtpd_tls_ciphers = high Any ideas? Regards,
