Unknown user again

[Bill Anderson]

I don't know if you need this, but we are running version 4.28.6 of
MailScanner.

bill anderson
----- Original Message -----
From: "Bill Anderson" <billa at STERLING.NET>
To: <MAILSCANNER at JISCMAIL.AC.UK>
Sent: Wednesday, October 20, 2004 11:40 AM
Subject: Re: Unknown user again


> That is exaclty what I want!
>
> Thanks.
>
> bill anderson
>
>
> ----- Original Message -----
> From: "Julian Field" <mailscanner at ECS.SOTON.AC.UK>
> To: <MAILSCANNER at JISCMAIL.AC.UK>
> Sent: Wednesday, October 20, 2004 11:37 AM
> Subject: Re: Unknown user again
>
>
> > Okay, there's a different approach you could use for what you explain
> below.
> >
> > What you can do is write a tiny little Custom Function in MailScanner
that
> > looks at the subject line of the message, and if it is along the lines
of
> > "Returned mail: see transcript for details" or "Delivery Status
> > Notification \(Failure\)" then put the outgoing message in a queue you
> > never deliver. There are many ways of achieving the same effect in
> > MailScanner, this just happens to be very similar to one I wrote earlier
> > this week for my own site.
> >
> > What I wanted to do was to put all delivery failure messages in a queue
> > that is run a lot slower than the main outgoing queue.
> >
> > You could use the same thing, but with a cron job that just deletes all
> the
> > files in the extra queue every hour or so.
> >
> > If you want to see how to do that, reply to this and confirm that this
> will
> > solve your problem for now. I don't want to post (and write) a whole
bunch
> > of code and setup for you if it's not what you want.
> >
> > At 19:21 20/10/2004, you wrote:
> > >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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> >
>
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