Unknown user again

[Bill Anderson]

Thank you very much.

- bill anderson
----- Original Message -----
From: "Julian Field" <mailscanner at ECS.SOTON.AC.UK>
To: <MAILSCANNER at JISCMAIL.AC.UK>
Sent: Wednesday, October 20, 2004 12:09 PM
Subject: Re: Unknown user again


> Okay, here goes.
>
> In /etc/MailScanner/MailScanner.conf, put this
> Outgoing Queue Dir = &OutgoingQueue
>
> In /usr/lib/MailScanner/MailScanner/CustomConfig.pm, add this near the top
> -----SNIP-----
> my $DefaultQueue = '/var/spool/mqueue';
> my $SlowQueue    = '/var/spool/mqueue.slow';
>
> sub InitOutgoingQueue {
>    # No initialisation needs doing here at all.
>    MailScanner::Log::InfoLog("Initialising OutgoingQueue");
> }
>
> sub EndOutgoingQueue {
>    # No shutdown code needed here at all.
>    # This function could log total stats, close databases, etc.
>    MailScanner::Log::InfoLog("Ending OutgoingQueue");
> }
>
> # This will return 1 for all messages except those generated by this
> # computer.
> sub OutgoingQueue {
>    my($message) = @_;
>
>    return $DefaultQueue unless $message; # Default if no message passed in
>
>    # Put the crap in the slow queue
>    return $SlowQueue
>      if $message->{subject} =~ /^Returned mail: see transcript for
details/i ||
>         $message->{subject} =~ /^Delivery Status Notification
\(Failure\)/i  ||
>         $message->{subject} =~ /^Warning: could not send message for
past/i;
>
>    # Put everything else in the fast queue
>    return $DefaultQueue;
> }
> -----SNIP-----
>
> Then set up a cron job in /etc/cron.hourly to do this
>
> -----SNIP-----
> #!/bin/sh
> logger -p mail.notice 'Cleaning out slow queue'
> rm -f /var/spool/mqueue.slow/*
> exit 0
> -----SNIP-----
>
> Then just stop and restart MailScanner.
>
> At 19:40 20/10/2004, you wrote:
> >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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>
> --
> 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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> Before posting, read the MAQ (http://www.mailscanner.biz/maq/) and
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