[ILUG] mail duplicates

[Chris Higgins]

On Fri, 19 Mar 2004 13:37:55 +0000
Kevin Philp <kevin at cybercolloids.net> wrote:

> On a slightly different note we have a client who bombs us with
> duplicate mails, is this an example of a "moron with exchange" that

Check the message id's of both copies - if they are the same it
is a duplicate, if not then they are two different mails being
injected into the mail system (probably from the MUA )

> you talk about? We have just started doing a lot of business with this
> guy and I can sense a mountain of complaints coming my way! Below is
> the bit of the header that comes from his server and can be found in
> all the duplicates... it sounds like the same POP and multidrop
> problem we discussed earlier. Before I start complaining to him is
> there anything I can do at my end?
> 
> 
> 
> 
> 
> Kevin Philp wrote:
> > We have one user who works off site and they have a virtual pop box
> > with the name anne at cybercolloids.net. The problem is that the ISP,
> > correctly, feeds annes mail to the VPOP box and the rest to out
> > multidrop box. However if the mail is sent to fred and copied to
> > anne it ends up in both boxes and our mail server then sends anne
> > another copy because it doesn't know she has already got a copy from
> > the vpop box. Is there some way I can stop our server duplicating
> > mail for anne.
> 
> This is why splitting up email collected via POP based on headers
> rather than envelope (which is of course unavailable) sucks.
> Especially when the mail server is misconfigured to attempt delivery
> for _every_ email address it finds in the headers. (Although I've only
> ever seen this with morons running Exchange.)
> 
> As Rick would say, don't do this. Use the correct protocol for the
> job: SMTP.
> 
> -- 
> Irish Linux Users' Group
> http://www.linux.ie/mailman/listinfo/ilug/
> 


--

Chris Higgins                              Cisco Learning Partner
Darach Technology Ltd                      tel: +353-1-6204370
email: chris.higgins at darach.ie          fax: +353-1-6204371
http://www.darach.ie