I just received the following message regarding a mail problem with a site we 
host.  We run 4.07 and have the anti-spam feature turned on (forwards only 
our own users' mail).  Of course, these people were apparently sending mail 
in; so why was there a problem?  We've never had this happen before.  Anyone 
else run into this?

Ben Bednarz

========================================
(message received:)
In a message dated 8/2/99 7:27:13 AM Pacific Daylight Time, [EMAIL PROTECTED] 
writes:

<< 
 Your mail server is rejecting valid delivery error messages from our
 mail server, presumably due to the use of the null envelope-sender
 address on those messages. Internet mail standards require both the 
 use and the acceptance of the null "mail from:" on messages from 
 mailer daemon processes.
 
 References:
 
    Simple Mail Transfer Protocol
    http://www.rfc-editor.org/rfc/rfc821.txt
 
    Requirements for Internet Hosts
    http://www.rfc-editor.org/rfc/rfc1123.txt
 
    Anti-Spam Recommendations for SMTP MTAs
    http://www.rfc-editor.org/rfc/rfc2505.txt
 
 --
 Paul Russell
 Senior System Administrator
 University of Notre Dame
 
 ----- Original message -----
 > 
 > The original message was received at Fri, 30 Jul 1999 18:02:21 -0500
 > (EST)
 > from localhost
 > 
 >         UNIVERSITY OF NOTRE DAME EMAIL ADDRESSES
 >         CAN BE FOUND USING THE FOLLOWING WEB URL:
 >         http://www.nd.edu/~email
 > 
 >    ----- The following addresses had permanent fatal errors -----
 > <[EMAIL PROTECTED]>
 > 
 >    ----- Transcript of session follows -----
 > ... while talking to mail.bcwebhost.net.:
 > >>> MAIL From:<> SIZE=7368
 > <<< 501 bogus mail from
 > 501 <[EMAIL PROTECTED]>... Data format error
 > 
 >     ---------------------------------------------------------------
 > Reporting-MTA: dns; dagger.nd.edu
 > Received-From-MTA: X-Unix; [208.8.150.202]
 > Arrival-Date: Fri, 30 Jul 1999 18:02:21 -0500 (EST)
 > 
 > Final-Recipient: rfc822; [EMAIL PROTECTED]
 > Action: failed
 > Status: 5.5.2
 > Remote-MTA: DNS; mail.bcwebhost.net
 > Diagnostic-Code: SMTP; 501 bogus mail from
 > Last-Attempt-Date: Fri, 30 Jul 1999 18:02:22 -0500 (EST)
 > 
 >     ---------------------------------------------------------------
 > 
 > Subject: Returned mail: User unknown
 > Date: Fri, 30 Jul 1999 18:02:21 -0500 (EST)
 > From: Mail Delivery Subsystem <MAILER-DAEMON>
 > To: <[EMAIL PROTECTED]>
 > 
 > The original message was received at Fri, 30 Jul 1999 17:59:21 -0500
 > (EST)
 > from [208.8.150.202]
 > 
 >         UNIVERSITY OF NOTRE DAME EMAIL ADDRESSES
 >         CAN BE FOUND USING THE FOLLOWING WEB URL:
 >         http://www.nd.edu/~email
 > 
 >    ----- The following addresses had permanent fatal errors -----
 > <[EMAIL PROTECTED]>
 > 
 >    ----- Transcript of session follows -----
 > bolt.l: Mailbox does not exist
 > 550 <[EMAIL PROTECTED]>... User unknown
 > 
 >     ---------------------------------------------------------------
 > Reporting-MTA: dns; dagger.nd.edu
 > Received-From-MTA: DNS; [208.8.150.202]
 > Arrival-Date: Fri, 30 Jul 1999 17:59:21 -0500 (EST)
 > 
 > Final-Recipient: RFC822; <[EMAIL PROTECTED]>
 > Action: failed
 > Status: 5.1.1
 > Last-Attempt-Date: Fri, 30 Jul 1999 18:02:21 -0500 (EST)
 > 
 >     ---------------------------------------------------------------
 > 
 > Subject: July Sc email.doc
 > Date: Fri, 30 Jul 99 15:53:44 Pacific Daylight Time
 > From: "Ring-of-Fire" <[EMAIL PROTECTED]>
 > To: "Mary Bolt" <[EMAIL PROTECTED]>
 > 
 > >(*'Y
 > bjbjWW==]
 > ^``````$OC****.^^*Z*:(,^
 > @.#'.T
 > Ring-of-Fire July Science Letter
  >>
==================================================
(remainder of message clipped)


Your mail server is rejecting valid delivery error messages from our
mail server, presumably due to the use of the null envelope-sender
address on those messages. Internet mail standards require both the 
use and the acceptance of the null "mail from:" on messages from 
mailer daemon processes.

References:

        Simple Mail Transfer Protocol
        http://www.rfc-editor.org/rfc/rfc821.txt

        Requirements for Internet Hosts
        http://www.rfc-editor.org/rfc/rfc1123.txt

        Anti-Spam Recommendations for SMTP MTAs
        http://www.rfc-editor.org/rfc/rfc2505.txt

--
Paul Russell
Senior System Administrator
University of Notre Dame

----- Original message -----
> 
> The original message was received at Fri, 30 Jul 1999 18:02:21 -0500
> (EST)
> from localhost
> 
>         UNIVERSITY OF NOTRE DAME EMAIL ADDRESSES
>         CAN BE FOUND USING THE FOLLOWING WEB URL:
>         http://www.nd.edu/~email
> 
>    ----- The following addresses had permanent fatal errors -----
> <[EMAIL PROTECTED]>
> 
>    ----- Transcript of session follows -----
> ... while talking to mail.bcwebhost.net.:
> >>> MAIL From:<> SIZE=7368
> <<< 501 bogus mail from
> 501 <[EMAIL PROTECTED]>... Data format error
> 
>     ---------------------------------------------------------------
> Reporting-MTA: dns; dagger.nd.edu
> Received-From-MTA: X-Unix; [208.8.150.202]
> Arrival-Date: Fri, 30 Jul 1999 18:02:21 -0500 (EST)
> 
> Final-Recipient: rfc822; [EMAIL PROTECTED]
> Action: failed
> Status: 5.5.2
> Remote-MTA: DNS; mail.bcwebhost.net
> Diagnostic-Code: SMTP; 501 bogus mail from
> Last-Attempt-Date: Fri, 30 Jul 1999 18:02:22 -0500 (EST)
> 
>     ---------------------------------------------------------------
> 
> Subject: Returned mail: User unknown
> Date: Fri, 30 Jul 1999 18:02:21 -0500 (EST)
> From: Mail Delivery Subsystem <MAILER-DAEMON>
> To: <[EMAIL PROTECTED]>
> 
> The original message was received at Fri, 30 Jul 1999 17:59:21 -0500
> (EST)
> from [208.8.150.202]
> 
>         UNIVERSITY OF NOTRE DAME EMAIL ADDRESSES
>         CAN BE FOUND USING THE FOLLOWING WEB URL:
>         http://www.nd.edu/~email
> 
>    ----- The following addresses had permanent fatal errors -----
> <[EMAIL PROTECTED]>
> 
>    ----- Transcript of session follows -----
> bolt.l: Mailbox does not exist
> 550 <[EMAIL PROTECTED]>... User unknown
> 
>     ---------------------------------------------------------------
> Reporting-MTA: dns; dagger.nd.edu
> Received-From-MTA: DNS; [208.8.150.202]
> Arrival-Date: Fri, 30 Jul 1999 17:59:21 -0500 (EST)
> 
> Final-Recipient: RFC822; <[EMAIL PROTECTED]>
> Action: failed
> Status: 5.1.1
> Last-Attempt-Date: Fri, 30 Jul 1999 18:02:21 -0500 (EST)
> 
>     ---------------------------------------------------------------
> 
> Subject: July Sc email.doc
> Date: Fri, 30 Jul 99 15:53:44 Pacific Daylight Time
> From: "Ring-of-Fire" <[EMAIL PROTECTED]>
> To: "Mary Bolt" <[EMAIL PROTECTED]>
> 
> >(*'Y
> bjbjWW==]
> ^``````$OC****.^^*Z*:(,^
> @.#'.T
> Ring-of-Fire July Science Letter
> Question of the month: Industrial diamonds are commercially
> manufactured in chemical laboratories and plants. Do you know what
> common household item was used when the first scientists were trying
> to make industrial diamonds? (Answer next month.)
> The hottest place on earth for the week ending July 23, 1999 was
> Adrar, Algeria. It was over 120( degrees there. The coldest place on
> earth was Vostok (Russia) Antarctica at minus 110(.
> Earthquakes occurred in the following places this past week: southern
> Bangladesh, eastern Turkey, Colombia, Peru, south central Alaska,
> southwestern islands of Japan, and in Taiwan.
> India has had very severe monsoon rains this year. Floods in the
> Kaziranga National Park are threatening the nearly extinct one-horned
> rhinos. The park has the last major population of these animals and it
> is flooded right now.
> The Soufriere Hills volcano on the West Indies island of Montserrat
> exploded and sent pyroclastic flows down its eastern slopes. The ash
> from the volcano shot into the air over 40,000 feet. Colima volcano in
> western Mexico erupted with a four-mile high plume of smoke. Three
> hundred people from four towns had to evacuated.
> In early July 50 Beluga whales were trapped by shifting ice in the
> Canadian Arctic. Hungry polar bears were waiting at their breathing
> holes. When the whales surfaced for air the bears would drag them on
> the ice and attack them. Inuits punched holes in the ice to give the
> whales a better chance to survive until the seasonal ice melt creates
> an escape channel for the whales.
> A new species of a deer in southeast Asia has been found. It is called
> the Leaf Deer and is only twenty inches high at the shoulder and
> doesn't weigh over twenty-five pounds. The deer lives in northern
> Myanmar, formerly the country of Burma.
> If you haven't visited our web site you might like to. The mountain we
> are featuring right now is Mt. St. Helens. We also have a fun activity
> about bubbling eggshells plus an interesting fact.
> Our goal is to change the mountain and activities each month. So catch
> our web site at Ring-of-Fire.com and find out some more fun and
> interesting things about science.
> Myrna
> {|
> j!"tu9
> :
> /
> !"tu9
> :
> /
> / =!"#$%
> [(@(NormalCJmH<A@<Default Paragraph Font
> 5:U^1
> Myrna L. Martin2C:\windows\TEMP\AutoRecovery save of
> Document1.asdMyrna L. Martin7C:\Ring-of-Fire.doc\email
> compliments\July Sc email.docMyrna L.
> Martin6C:\windows\TEMP\AutoRecovery save of July Sc email.asdMyrna L.
> Martin7C:\Ring-of-Fire.doc\email compliments\July Sc email.docMyrna L.
> Martin7C:\Ring-of-Fire.doc\email compliments\July Sc email.docMyrna L.
> Martin7C:\Ring-of-Fire.doc\email compliments\July Sc email.doc4~("H
> `nRhho(.hho(.
> `4~("@ t @GTimes New Roman5 Symbol3&Arial"qh*77r7L?! 20d Ring-of-Fire
> July Science LetterMyrna L. MartinMyrna L. Martin
> Oh+'0(
> DP
> \
> ht|!Ring-of-Fire July Science LetterrosingMyrna L.
> MartinyrnNormal.Myrna L. Martin4rnMicrosoft Word 8.0c@
> @s%@@ '?
> +,D.+,X
> hp
> Ring-of-Fireej!Ring-of-Fire July Science Letter
> Title 6>
> _PID_GUIDAN{FF5B4B09-45D5-11D3-94E8-E2A445CE8132}
> !"#$%&)Root EntryF`P#WP#'+
> 
>1TableWordDocumentSummaryInformation(DocumentSummaryInformation8CompObjjObjectPoolWP#'WP#'
> FMicrosoft Word Document
> MSWordDocWord.Document.89q


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