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Re: Would your SMTP server accept -> ehlo MAPI1.0 ???

Cross-posted to 2 groups.

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"Mail Man"  wrote in message news:5078AD79.AADEC93F@Man.com...
Recently I've been trying to figure out why a Trendnet TV-IP110w
IP-camera was not able to connect to my SMTP server to send mail.

I performed some packet analysis and found that the camera was greeting
the server with this:

  ehlo MAPI1.0

And my server responds with this:

  501 Invalid domain syntax

In looking at the ehlo specifications, the greeting is supposed to
contain something that looks like a domain-name.  So I believe the
string "MAPI1.0" is being rejected by my server on that basis.

When I redirect the camera to use my ISP's out-bound MTA server, it
apparently accepts the ehlo and the email is delivered correctly.  In
doing so, I see this in the header generated by the camera:

   X-Status: Alpha
   X-Mailer: Fitivision Mail API V1.0

I've updated the camera's firmware, but it doesn't change the ehlo
string.

The firmware file is in the format .pck and seems to require unpacking
and re-engineering on a linux machine (which I'm unfamiliar with).  My
intention would have been to replace the MAPI1.0 string with something
more acceptible to my server.

In posting this, I just wanted to document this issue (I have seen
others mention SMTP problems with this camera in other forums) and I
wanted to know why the firmware programmers would have used this string
for their ehlo greeting - and would it be compatible with some (or many,
or most) SMTP servers in current operation.

==============

The ehlo string given is syntactically correct, but semantically wrong. 
"501" is an incorrect response.  "554" would be correct.

The parameter, if given, is supposed to be a hostname or domain IP literal 
(i.e. a bracketed IP address).  This is neither -- as there are no TLDs that 
are solely digits.  Note that there is no requirement that the parameter 
given be a match (via PTR-RRs) to the IP address of the interface used.

Personally, I also reject "localhost" when not presented on the loopback 
interface.  (Yes, some spammers have also tried that.)  Likewise, I reject 
the ".invalid" and ".test" TLDs and ".example" as a TLD or 2LD (the latter 
only where reserved by the ICANN domain contract).

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Would your SMTP server accept -> ehlo MAPI1.0   ??? Mail Man <Mail@Man.com> - 2012-10-12 19:53 -0400
  Re: Would your SMTP server accept -> ehlo MAPI1.0   ??? Solbu <solbu@solbu.net.ugyldig> - 2012-10-27 03:31 +0200
    Re: Would your SMTP server accept -> ehlo MAPI1.0   ??? Jorgen Grahn <grahn+nntp@snipabacken.se> - 2012-10-27 18:06 +0000
      Re: Would your SMTP server accept -> ehlo MAPI1.0   ??? Mail Man <Mail@Man.com> - 2012-10-27 20:14 -0400
        Re: Would your SMTP server accept -> ehlo MAPI1.0   ??? Fritz Wuehler <fritz@spamexpire-201210.rodent.frell.theremailer.net> - 2012-10-28 14:07 +0100
          Re: Would your SMTP server accept -> ehlo MAPI1.0   ??? Mail Man <Mail@Man.com> - 2012-10-28 12:35 -0400
            Re: Would your SMTP server accept -> ehlo MAPI1.0   ??? Anonymous <nobody@remailer.paranoici.org> - 2012-10-28 20:49 +0000
        Re: Would your SMTP server accept -> ehlo MAPI1.0   ??? Jorgen Grahn <grahn+nntp@snipabacken.se> - 2012-10-29 22:08 +0000
        Re: Would your SMTP server accept -> ehlo MAPI1.0   ??? Claus Aßmann <ca+sendmail(-no-copies-please)@mine.informatik.uni-kiel.de> - 2012-11-02 02:04 +0000
          Re: Would your SMTP server accept -> ehlo MAPI1.0   ??? Mail Man <Mail@Man.com> - 2012-11-02 08:53 -0400
            Re: Would your SMTP server accept -> ehlo MAPI1.0   ??? Claus Aßmann <ca+sendmail(-no-copies-please)@mine.informatik.uni-kiel.de> - 2012-11-02 22:19 +0000
              Re: Would your SMTP server accept -> ehlo MAPI1.0   ??? "Thor Kottelin" <thor@anta.net> - 2012-11-03 11:52 +0200
                Re: Would your SMTP server accept -> ehlo MAPI1.0   ??? Mail Man <Mail@Man.com> - 2012-11-03 09:44 -0400
                Re: Would your SMTP server accept -> ehlo MAPI1.0   ??? Mail Man <Mail@Man.com> - 2012-11-03 09:56 -0400
                Re: Would your SMTP server accept -> ehlo MAPI1.0   ??? bonomi@host122.r-bonomi.com (Robert Bonomi) - 2012-11-10 13:07 -0600
                Re: Would your SMTP server accept -> ehlo MAPI1.0   ??? Mike Scott <usenet.14@scottsonline.org.uk.invalid> - 2012-11-13 09:45 +0000
  Re: Would your SMTP server accept -> ehlo MAPI1.0   ??? Barry Margolin <barmar@alum.mit.edu> - 2012-10-28 22:17 -0400
  Re: Would your SMTP server accept -> ehlo MAPI1.0   ??? "D. Stussy" <spam+newsgroups@bde-arc.ampr.org> - 2014-01-31 13:06 -0800
    Re: Would your SMTP server accept -> ehlo MAPI1.0   ??? Jorgen Grahn <grahn+nntp@snipabacken.se> - 2014-02-01 17:45 +0000
      Re: Would your SMTP server accept -> ehlo MAPI1.0   ??? VanguardLH <V@nguard.LH> - 2014-02-02 00:48 -0600
        Windows Live Mail (Was: Re: Would your SMTP server accept -> ehlo MAPI1.0   ???) Tristan Miller <psychonaut@nothingisreal.com> - 2014-02-03 14:58 +0100
          Re: Windows Live Mail (Was: Re: Would your SMTP server accept -> ehlo MAPI1.0   ???) VanguardLH <V@nguard.LH> - 2014-02-03 21:32 -0600
            Re: Windows Live Mail (Was: Re: Would your SMTP server accept -> ehlo MAPI1.0   ???) Tristan Miller <psychonaut@nothingisreal.com> - 2014-02-05 17:29 +0100

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