Unknown user again

[Bill Anderson]

Thank you for the responses so far.  I apologize for being  a little dense,
so please bear with me.

I think I have the LDAP part down.

My other question is somewhat different of the LDAP question above.  I think
I understand that doing the LDAP routing piece will fix my problem, however,
it will take some time to get it going.  The short term fix I was looking
for is the ability to have mailscanner or sendmail after it has tried to
relay an email to another server where the user does not exist, to not try
and reply back to the sender that the address does not exist.  Basically my
servers are accepting all email for a domain, scanning it, then forwarding
it on.  In 50% of the cases, the email is destined to a non-existant address
and I get a 550 message, so I try to send it back to the sender.  For now I
just want to drop all of those when I get the 550 back.  I still will accept
and scan all email destined for that domain.  I know it is not perfect, but
I will stop spamming others with my "unknown user" replies.

Thanks for bearing with me.

bill anderson

----- Original Message -----
From: "Julian Field" <mailscanner at ECS.SOTON.AC.UK>
To: <MAILSCANNER at JISCMAIL.AC.UK>
Sent: Wednesday, October 20, 2004 11:01 AM
Subject: Re: Unknown user again


> At 18:47 20/10/2004, you wrote:
> >When you say local db file, are you refering to the accessdb file in
> >sendmail?
>
> No, a separate one created for the job.
>
> >   So, if I can paraphrase what you just said.  Using some sort of
> >script that get's a list of emails from the various email servers, some
> >LDAP, some not.  Compile this list into an accessdb file for use by
> >sendmail?
>
> Not into an accessdb, but into a db file that describes where to send
email
> for all of your users. It's basically all in the FAQ at
> http://www.sng.ecs.soton.ac.uk/mailscanner/serve/cache/270.html
> The setup described there is for getting a routing database out of an
> Exchange server running Active Directory, but the sendmail setup is
exactly
> the same.
>
> >Is there anyway to have sendmail / mailscanner drop 550 errors it
receives
> >from the other mail servers?  I want to fix my short term problem.
>
> Yes, by doing this. If the rcpt address isn't in the ldap (but actually a
> db file) routing table, the message gets rejected at SMTP time.
>
> >----- Original Message -----
> >From: "Julian Field" <mailscanner at ECS.SOTON.AC.UK>
> >To: <MAILSCANNER at JISCMAIL.AC.UK>
> >Sent: Wednesday, October 20, 2004 10:27 AM
> >Subject: Re: Unknown user again
> >
> >
> > > There is a tweak on option (1). You can use the LDAP routing setup,
> >without
> > > *actually* using LDAP to build it. So you could have a script run from
> >cron
> > > that queried each of the servers somehow, and built a local db file of
all
> > > the valid addresses it should accept mail for. Then you use the LDAP
> > > routing setup to use this local db file.
> > >
> > > At 18:18 20/10/2004, you wrote:
> > > >1)  LDAP - many of the the servers don't support LDAP.  The ability
to
> >build
> > > >a comprehnsive LDAP server is outside of our scope.
> > > >
> > > >1)  Is there anyway I can tell MailScanner and/or sendmail to not
respond
> >to
> > > >a 550 unknown user error?  Bascially Mailscanner tries to deliver an
> >email
> > > >to an unknown user.  Once it gets the 550 error, it drops it.  I know
the
> > > >downside of what if it was an honest mistake, the sender would not be
> > > >notified.  I would like to do this on a domain by domain basis.
> > > >
> > > >2) Can I talk to multiple LDAP databases depending on what domain the
> > > >address is destined to.
> > >
> > > --
> > > Julian Field
> > > www.MailScanner.info
> > > Professional Support Services at www.MailScanner.biz
> > > MailScanner thanks transtec Computers for their support
> > > Buy the MailScanner book at www.MailScanner.info/store
> > >
> > > PGP footprint: EE81 D763 3DB0 0BFD E1DC 7222 11F6 5947 1415 B654
> > >
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> > > the archives (http://www.jiscmail.ac.uk/lists/mailscanner.html).
> > >
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>
> --
> Julian Field
> www.MailScanner.info
> Professional Support Services at www.MailScanner.biz
> MailScanner thanks transtec Computers for their support
> Buy the MailScanner book at www.MailScanner.info/store
>
> PGP footprint: EE81 D763 3DB0 0BFD E1DC 7222 11F6 5947 1415 B654
>
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> To unsubscribe, email jiscmail at jiscmail.ac.uk with the words:
> 'leave mailscanner' in the body of the email.
> Before posting, read the MAQ (http://www.mailscanner.biz/maq/) and
> the archives (http://www.jiscmail.ac.uk/lists/mailscanner.html).
>

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