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<p dir="auto">On 21 Aug 2015, at 8:30, Benny Kjær Nielsen wrote:</p>
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<p dir="auto">On 21 Aug 2015, at 5:11, Bill Cole wrote:</p>
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<p dir="auto">Wait... What?! REALLY? There are servers answering on port 465 with a plaintext SMTP banner? That is irredeemably broken. I could understand trying to tighten up port 465 by disabling SSLv2 and SSLv3 specifically (maybe even TLSv1.0) and weak ciphers, but configuring it like it's port 587 is beyond the pale.</p>
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<p dir="auto">Now you made me question my own sanity :-) With the help of MailMate I found the email thread which is the basis of my claim. A user couldn't make MailMate work with port 465 and I found out that his server used STARTTLS. I introduced code to handle this and then it worked for him. Unfortunately, this server is no longer responding (<code>mail.fbi.h-da.de</code>) so there is no smoking gun. (This was more than 4 years ago.)</p>
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<p dir="auto">For the record (and my sanity), here is a smoking gun: <code>west.exch022.serverdata.net</code> on port 465.</p>
<pre style="background: #E4E4E4; border: thin solid gray; margin-left: 15px; margin-right: 15px; overflow: auto; padding: 5px"><code>> telnet west.exch022.serverdata.net 465
Trying 64.78.22.105...
Connected to west.exch022.serverdata.net.
Escape character is '^]'.
220 west.exch022.serverdata.net Microsoft ESMTP MAIL Service ready at Wed, 16 Sep 2015 01:49:57 -0700
</code></pre>
<pre style="background: #E4E4E4; border: thin solid gray; margin-left: 15px; margin-right: 15px; overflow: auto; padding: 5px"><code>> openssl s_client -connect west.exch022.serverdata.net:465
CONNECTED(00000003)
8997:error:140770FC:SSL routines:SSL23_GET_SERVER_HELLO:unknown protocol:/SourceCache/OpenSSL098/OpenSSL098-52.40.1/src/ssl/s23_clnt.c:618:
</code></pre>
<p dir="auto">In the next update of MailMate I've reintroduced (better) code for automatically handling this special case.</p>
<p dir="auto">-- <br>
Benny</p>
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