[TriLUG] Re: Problems with Sendmail

[Brian Weaver]

OOPS, appears the link didn't quite go where I wanted it.

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30.8.22 F=g

Suppress From:<>
(V8.6 and above)

    The special address <> is used as the envelope sender when
sendmail bounces a mail message. This address is intended to prevent
bounced messages from themselves bouncing. Unfortunately, not all
configuration files properly handle this form of sender address. The
stock SunOS configuration files prior to Solaris 2.3, for example,
caused sendmail to enter an endless loop when processing <>. Also,
some UUCP implementations get confused when they are executed with
command line arguments of:

-f <>

    As an interim measure, until all programs learn to correctly
handle the <> address, you may use the F=g flag to suppress that
address for selected delivery agents. If the F=g flag is set for a
delivery agent, it uses the value of $g (see Section 31.10.16) in
place of the <>, where $g contains $n (usually MAILER-DAEMON see
Section 31.10.26, $n) with an @ and your domain name appended.

----

On 3/3/06, Brian Weaver <cmdrclueless at gmail.com> wrote:
> No probably not a tenable solution.... MXLogic shouldn't get business
> when it cannot provide proper support.
>
> I think I may have found the solution. The mailer flags may need to be modified
>
> http://www.unix.org.ua/orelly/networking/sendmail/ch30_08.htm#SML2-CH-30-SECT-8-22
>
> -Brian
>
> On 3/3/06, Lance A. Brown <lance at bearcircle.net> wrote:
> > Brian Weaver wrote:
> > > Does any Sendmail guru out there know how to force sendmail to place a
> > > valid or invalid address into the From lilne for the MDN messages?
> >
> > That's a bad solution, begging for mail loops and similar not-fun
> > results.  MDNs need to have an empty envelope mail from to prevent the
> > MDN from generating bounce mail, etc. that might cause another MDN to go
> > out, repeat...
> >
> > Tell friend to get a decent mail cleaning server. :-)  I know, probably
> > not a tenable solution.
> >
> > --[Lance]
> >
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>


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