Path: csiph.com!usenet.pasdenom.info!aioe.org!.POSTED!not-for-mail From: Mail Man Newsgroups: comp.mail.misc,alt.comp.mail.misc,comp.mail.headers Subject: Re: Would your SMTP server accept -> ehlo MAPI1.0 ??? Date: Sat, 27 Oct 2012 20:14:38 -0400 Organization: Aioe.org NNTP Server Lines: 42 Message-ID: <508C78EE.EAD2B0E9@Man.com> References: <5078AD79.AADEC93F@Man.com> NNTP-Posting-Host: j00MYSoEYuGlIbYp6y1sZw.user.speranza.aioe.org Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Complaints-To: abuse@aioe.org X-Mailer: Mozilla 4.79 [en] (Win98; U) X-Accept-Language: en X-Notice: Filtered by postfilter v. 0.8.2 Xref: csiph.com comp.mail.misc:326 comp.mail.headers:7 Jorgen Grahn wrote: > On Sat, 2012-10-27, Solbu wrote: > >> I wanted to know why the firmware programmers would have used > >> this string for their ehlo greeting > > > > They use it because more and more SMTP servers require a > > HELO/EHLO greeting before they accept any email. > > Huh? HELO has been mandatory with SMTP since the 1980s. You both missed the entire point of my original question. So I will repeat it. =========== 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. ============ So you see, it's not that this camera wasn't generating a "ehlo" greeting. The issue is the "MAPI1.0" part of the ehlo greeting that my SMTP server apparently doesn't like, and it doesn't seem to like it because according to SMTP standards "MAPI1.0" is not a valid domain-name. Comments?