Date: Tue, 11 Jun 2002 08:53:18 +0100 From: Ceri Davies <setantae@submonkey.net> To: Terry Lambert <tlambert2@mindspring.com> Cc: Giorgos Keramidas <keramida@ceid.upatras.gr>, freebsd-chat@FreeBSD.ORG Subject: Re: SMTP and XREMOTEQUEUE Message-ID: <20020611075318.GB4969@submonkey.net> In-Reply-To: <3D054BC1.974263A3@mindspring.com> References: <20020610124715.GA6885@submonkey.net> <20020611000603.GA25157@hades.hell.gr> <3D054BC1.974263A3@mindspring.com>
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On Mon, Jun 10, 2002 at 06:00:49PM -0700, Terry Lambert wrote: > Giorgos Keramidas wrote: > > On 2002-06-10 13:47 +0100, Ceri Davies wrote: > > > I have googled and grepped for this but I cannot find an answer, and > > > it seems way too off topic for -questions, so maybe someone here > > > won't mind telling me what the SMTP extension XREMOTEQUEUE is for, > > > and where I can read some documentation on it. > > > > I think that commands starting with 'X' are not part of the ESMTP > > standard. Looking through the RFCs, since I remembered that this is > > the case from an earlier time that I had seen it I quote RFC 1869: > > This is correct. For sure. > > Therefore, the answer to your question depends on what the server that > > sends an XREMOTEQUEUE response has implemented it to mean. > > This is a proprietary mechanism of triggering an ETRN, so that > the ETRN itself can not be used as a means of a denial of > service attack. Apparently, you are talking to a Post.Office > server (from Software.COM, or the company which purchased them, > OneBox). That's right - it's one of mine; as I flushed the queue on one of our exim mailhubs yesterday I decided to watch it go, and noticed the above extension in the dialogue for the first time in approx. 40 months! I thought it was Openwave that had bought Software.COM, though ? > In any case, XREMOTEQUEUE is not documented, and is a proprietary > extension for the Post.Office folks. You can reverse engineer it > fairly easily by setting up two Post.Office machines to use it, > and then monitoring the conversation between them. But I really > do not recommend it, given it's non-standard nature. If it's Post.Office only then I'm not really bothered, as I'm leaving this job at the end of next week and my new employers don't use it - it was just one of those annoying "What they hey *is* that?" questions that get me all worked up. Thanks for the explanation (interesting thing is that I've just checked the Post.Office docs and there's nothing in there about it either - ah well). Ceri -- you can't see when light's so strong you can't see when light is gone To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-chat" in the body of the message
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