If anyone has lost the link for RFC 821 (which appears to have happened for a few of us), here it is:
http://www.ietf.org/rfc/rfc0821.txt?number=821 Start reading at approximately page 13 for the subject at hand. Here is an example _IN THE RFC_ of a _FULLY COMPLIANT_ undeliverable mail notification message: ------------------------------------------------------------- Example Undeliverable Mail Notification Message S: MAIL FROM:<> R: 250 ok S: RCPT TO:<@HOSTX.ARPA:[EMAIL PROTECTED]> R: 250 ok S: DATA R: 354 send the mail data, end with . S: Date: 23 Oct 81 11:22:33 S: From: [EMAIL PROTECTED] S: To: [EMAIL PROTECTED] S: Subject: Mail System Problem S: S: Sorry JOE, your message to [EMAIL PROTECTED] lost. S: HOSTZ.ARPA said this: S: "550 No Such User" S: . R: 250 ok Example 7 ------------------------------------------------------------- Please note that there is nothing in "mail from" but a cute little <>. Seriously, this RFC, in addition to neat-o, accessible, and highly readable info on empty "mail from," is all you ever wanted to know about SMTP but were afraid to ask. But the real question; can we expect one on SCAMP soon? ;) -----Original Message----- From: Chris Scharff [mailto:[EMAIL PROTECTED]] Sent: Thursday, August 15, 2002 1:52 PM To: Exchange Discussions Subject: RE: Anonymous messages in the outbound queue Have you read RFC 821 yet? Did you pay $249 for that Microsoft call? Cause if so, I'd call back and ask them if they've read it (after you have of course). > -----Original Message----- > From: Karon Miller [mailto:[EMAIL PROTECTED]] > Sent: Thursday, August 15, 2002 11:58 AM > To: Exchange Discussions > Subject: RE: Anonymous messages in the outbound queue > > So if an NDR is trying to go to faked addresses used by SPAMMERS, then > does that mean that my server is being SPAM RELAYED? I've done the > Relay test and it's not being used as a Relay so are they getting in > some other way? When I called Microsoft they say it's from a > misconfigured firewall but my firewall guy says "impossible". So, I'm > back to looking at the Exchange server. Any other ideas? > > Thanks! > > > It's normal. They're NDRs, and probably NDRs trying to go to the > faked addresses used by spammers. Feel free to delete. > > > > -Peter > > > > > > -----Original Message----- > > From: Karon Miller [mailto:[EMAIL PROTECTED]] > > Sent: Tuesday, August 13, 2002 9:50 > > To: Exchange Discussions > > Subject: Anonymous messages in the outbound queue > > > > > > I've tried several things to prevent messages getting stuck in the> > Outbound queue of the IMS it's like someone is relaying SPAM off of > us. > > I've installed Trend Micro's InterScan 5 Messaging Security Suite > > and tried to block anonymous messages that way. Are they NDR's or > > messages > to > > user's that are no longer here? Normally I just delete them everyday > > but I'm concerned that we're being a relay of somekind. Is this > > normal for Exchange 5.5 > > > > Thanks! > > Karon > > > > > > > > > > _________________________________________________________________ > > List posting FAQ: http://www.swinc.com/resource/exch_faq.htm > > Archives: http://www.swynk.com/sitesearch/search.asp > > To unsubscribe: mailto:[EMAIL PROTECTED] > > Exchange List admin: [EMAIL PROTECTED] > > > > ______________________________________________ > > This message is private or privileged. If you are not the person > > for whom this message is intended, please delete it and notify me > > immediately, and please do not copy or send this message to anyone > > else. > > _________________________________________________________________ > List posting FAQ: http://www.swinc.com/resource/exch_faq.htm > Archives: http://www.swynk.com/sitesearch/search.asp > To unsubscribe: mailto:[EMAIL PROTECTED] > Exchange List admin: [EMAIL PROTECTED] _________________________________________________________________ List posting FAQ: http://www.swinc.com/resource/exch_faq.htm Archives: http://www.swynk.com/sitesearch/search.asp To unsubscribe: mailto:[EMAIL PROTECTED] Exchange List admin: [EMAIL PROTECTED] _________________________________________________________________ List posting FAQ: http://www.swinc.com/resource/exch_faq.htm Archives: http://www.swynk.com/sitesearch/search.asp To unsubscribe: mailto:[EMAIL PROTECTED] Exchange List admin: [EMAIL PROTECTED]
