home *** CD-ROM | disk | FTP | other *** search
- Path: sparky!uunet!ukma!hri.com!spool.mu.edu!yale.edu!news.yale.edu!wardmac2.med.yale.edu!user
- From: matt@wardsgi.med.yale.edu (Matt Healy)
- Newsgroups: comp.mail.misc
- Subject: Re: Just wondering...
- Message-ID: <matt-270193193229@wardmac2.med.yale.edu>
- Date: 28 Jan 93 00:40:40 GMT
- References: <REID.93Jan27012619@dsm.dsm.fordham.edu>
- Sender: news@news.yale.edu (USENET News System)
- Followup-To: comp.mail.misc
- Distribution: comp
- Organization: Yale University--Genetics
- Lines: 37
- Nntp-Posting-Host: wardmac2.med.yale.edu
-
- In article <REID.93Jan27012619@dsm.dsm.fordham.edu>,
- reid@dsm.fordham.edu (Darin Reid) wrote:
- >
- > Just wondering: I foward my mail from machine A to machine B - Then I
- > foward my mail frm machine B to machine A - what happens when someone
- > sends mail to either account?
- >
- > (I thought of this at 3:00 am, don't flame me - just curious to know)
- > --
- > Darin Reid
- >
-
- You would create what is called an "alias loop," a notorious
- problem with email. In most systems there is some kind of hop
- count parameter for just this reason. What will probably happen
- is that your message will bounce back and forth until the
- hop count limit is exceeded, then get returned to sender with
- an error message. If your mailers are really brain-damaged,
- the error message may itself bounce back and forth...
-
- This is obviously a great way to create massive amounts of
- traffic, especially since in many cases each pass through
- a mailer will add another header to the message so the
- bouncing message can get really long.
-
- Some really clever mailers can detect that a message is
- a bounce-back from such an alias loop, and stop this
- nonsense. One way is to look for your own header in the
- message, and analyze any such headers you find to see
- if such a loop is happening...
-
-
- Matt Healy
- "I pretend to be a network administrator; the lab
- net pretends to work!"
-
- matt@wardsgi.med.yale.edu
-