>You immediately >should NDR with a 5.4.6 code (for code meanings, see RFC 1893), which is >exactly what Exchange 2000 / Windows 2000 will do. (I do not know if >Exchange 5.5 does that)
Exchange 5.5 does not do that. Thanks for the clarification. -----Original Message----- From: David Lemson [mailto:[EMAIL PROTECTED]] Sent: Thursday, January 03, 2002 7:12 PM To: Baker, Jennifer Subject: Was: Question from a troll to a Yoda - Now: RFC Question The Exchange 2000 / Windows 2000 SMTP Service default is 15 and can be modified using \inetpub\adminscripts\adsutil.vbs. The metabase key to see is "smtpsvc/1/HopCount". With the informatio we have, Microsoft and Exchange does not believe that a limit like 100 is appropriate. However, if you would rather follow the suggestion in RFC 2821, you are welcome to change it. Realize that in the event of a misconfiguration that causes a 3-way loop, you may be spending a heck of a lot of CPU and disk resources in bouncing mail around before it stops. The MTA does not count Received: headers, so you were right to not be thinking about the MTA. And to answer Andy's original question, a trivial loop is where you have a recipient, you resolve that recipient, look them up in your routing system, and find out that you should connect to server FOO. Then, you look up server FOO and find out that server FOO is YOU! You immediately should NDR with a 5.4.6 code (for code meanings, see RFC 1893), which is exactly what Exchange 2000 / Windows 2000 will do. (I do not know if Exchange 5.5 does that) David Iron Chef SMTP -----Original Message----- From: Jennifer Baker [mailto:[EMAIL PROTECTED]] Sent: Thursday, January 03, 2002 1:43 PM To: Exchange Discussions Subject: RE: Was: Question from a troll to a Yoda - Now: RFC Question The Exchange IMS default is 18 and can be changed (MaxReceivedHeaders), atleast that is what I have been telling myself for 4 years. Or are we talking about the MTA? Or both? -----Original Message----- From: Daniel Chenault [mailto:[EMAIL PROTECTED]] Sent: Thursday, January 03, 2002 1:14 PM To: Exchange Discussions Subject: Re: Was: Question from a troll to a Yoda - Now: RFC Question After 5.5 SP2 the Received headers were counted. The limit is set to 512 I believe (don't know if this can be changed). Does the RFC say what constitutes a trivial loop? Not really. ----- Original Message ----- From: "Andy David" <[EMAIL PROTECTED]> To: "Exchange Discussions" <[EMAIL PROTECTED]> Sent: Thursday, January 03, 2002 2:47 PM Subject: RE: Was: Question from a troll to a Yoda - Now: RFC Question > Since we are on this subject again, maybe someone can answer this for > me since I got nary a response last time: > > 6.2 Loop Detection > > Simple counting of the number of "Received:" headers in a message has > proven to be an effective, although rarely optimal, method of > detecting loops in mail systems. SMTP servers using this technique > SHOULD use a large rejection threshold, normally at least 100 > Received entries. Whatever mechanisms are used, servers MUST contain > provisions for detecting and stopping trivial loops. > > What mechanism does Exchange use to detect and stop loops? What > constitutes a "trivial loop"? Are these stupid questions? > > > Andy > > > > > -----Original Message----- > From: Chris Scharff [mailto:[EMAIL PROTECTED]] > Sent: Thursday, January 03, 2002 3:21 PM > To: Exchange Discussions > Subject: RE: Question from a troll to a Yoda > > > If you take the time to read RFC2821 you can answer those questions, > and many others for yourself. http://www.faqs.org/rfcs/rfc2821.html > > Chris > -- > Chris Scharff > Senior Sales Engineer > MessageOne > If you can't measure, you can't manage! > > > > -----Original Message----- > > From: Tener, Richard [mailto:[EMAIL PROTECTED]] > > Sent: Thursday, January 03, 2002 2:29 PM > > To: Exchange Discussions > > Subject: RE: Question from a troll to a Yoda > > > > > > > > > > > > > > > > um... is it really not obvious? > > > > 1) There are too many recipients in the email (that's the TO: line) > > Whats the max amount would this be on the my server or the > > recievers server > > 2) The email is larger than the message limit (that means > > it's too big) > > and what is the limit in size that someone can send out. > > -- Drew > > ******************************** > > Visit http://www.drewncapris.net! Go! Go there now! > > "Each time a person stands up for an idea, or acts to improve > > the lot of others, or strikes out against injustice, (s)he > > sends forth a tiny ripple of hope, and crossing each other > > from a million different centers of energy and daring, those > > ripples build a current that can sweep down the mightiest > > walls of oppression and resistance." --Robert F. Kennedy > > > > -----Original Message----- > > From: [EMAIL PROTECTED] > > [mailto:[EMAIL PROTECTED]]On Behalf Of Tener, > > Richard > > Sent: Thursday, January 03, 2002 2:17 PM > > To: Exchange Discussions > > Subject: Question from a troll to a Yoda > > > > > > Can any Yoda tell me what this error or NDR means. I have seen about > > 8 of them today. > > > > 1.) A mail message was not sent due to a protocol error. > > > > 553 Too many recipients in the mail, should less than 100 The > > message that caused this notification was: > > > > > > 2.) A mail message was not sent due to a protocol error. > > > > 12107454 bytes exceeds server limit of 5120000 > > > > The message that caused this notification was: > > > > > > > > > > _________________________________________________________________ > > 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] > > > > _________________________________________________________________ > 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] > > ---------------------------------------------------------------------- > ---- ---- > The information contained in this email message is privileged and confidential information intended only for the use of the individual or entity to whom it is addressed. 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