Re: [courier-users] Re: Receiving mail from "cloaked" servers

[Mark N. <ma...@ne...>]

Just a side note to the subject.

A memory chip on one of our routers went bad, which resulted in one empty
mail message for each incoming mail. Only the first X bytes came through the
router (the SMTP conversation and the mail headers).

This wasn't Couriers fault at all, but it did take some time before I
figured out the problem.


/Mark

----- Original Message -----
From: "Sam Varshavchik" <mr...@co...>
To: <cou...@li...>
Sent: Monday, March 05, 2001 2:12 AM
Subject: [courier-users] Re: Receiving mail from "cloaked" servers


> Michael Tokarev writes:
>
> > Sam Varshavchik wrote:
> >>
> >> On Fri, 2 Mar 2001, Adam Sherman wrote:
> >>
> >> > This is actually a followup to my earlier post about "Wierd repeating
> >> > messages". I think I've norrowed down the problem!
> >> >
> >> > All the servers I am having trouble with are servers that don't
anwser
> >> > pings. So, I can talk to them on port 25, but they are behind anal
firewalls
> >> > that don't allow anything else.
> >> >
> >> > How would this affect Courier?
> >>
> >> It doesn't.
> >
> > Sam, you completely wrong here.  It's PMTU discovery problem, or
> > broken firewall problem.  Actually I can confirm that intelligent MTAs
> > can receive the same message multiple times in some broken firewall
> > configurations (but can't shurely describe what's happened; timeouts
> > are understandable but dups??).  Please look to
>
> Well, he was triggerring a bug in pre-0.32 versions which created dummy
> blank messages after a timeout.  That's the "weird repeating" messages in
> question.
>
>
>
>
> --
> Sam
>
>
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