Re: Sendmail question

From: Bill Vermillion (bv_at_wjv.com)
Date: 02/14/05

  • Next message: Bill Vermillion: "Re: Sendmail question" 
    Date: Sun, 13 Feb 2005 20:22:54 -0500
To: Noah Davidson <NoahD@oopz.com>

    On Sun, Feb 13, 2005 at 16:46 , while impersonating an expert on
    the internet, Noah Davidson sent this to stdout:

    > The only problem with that approach is that this is a back up
    > server and the users may not be able to know of all of the
    > users. Is there any way to not have all of these bounced mail go
    > to the postmaster / root account.

    My personal [and sometimes warped] opinion is that if it's a backup
    server then it needs to know about all accounts?

    Are users supposed to access this server if the main server is
    down. You could copy/rsync the virtualuser table to the backup
    machine.

    The only file that seems to need a restart is the local-host-names
    and aliases, virtusertable and others are dynamic so the changes
    are read each time.

    If you have a stock /etc/mail/aliases file the postmaster account
    is aliased to root. You do need a postmaster account, so if you
    create a user called postmaster, you could unalias the postmaster
    to root if that's what the main problem is.

    > ________________________________
    >
    > From: Bill Vermillion [mailto:bv@wjv.com]
    > Sent: Sun 2/13/2005 2:30 PM
    > To: Noah Davidson
    > Cc: FreeBSD-ISP List
    > Subject: Re: Sendmail question
    >
    >
    >
    > Ashes to ashes, and DOS to DOS Noah Davidson was heard to say
    > on or about Sun, Feb 13, 2005 at 14:10 :
    >
    > > I have set up a new FreeBSD box as mainly a backup mail server,
    > > although it is primary for a couple of domains. It is running
    > > sendmail 8.13.3 and it works fine, except for all the spam that
    > > is being sent to it to bad email addresses. I have aliased
    > > the root account to an email group on another server so that
    > > someone reads the root mail. The problem is that all the mail
    > > that spammers are sending to address that do not exist get
    > > bounced and the root account a notification (I believe it
    > > is the postmaster alias which is aliased to root). Is there
    > > any way to not have these notifications sent out. They are
    > > filling up the mail boxes. I just want the return to sender, but
    > > not to the root / postmaster as well. I have tried using the
    > > confCOPY_ERRORS_TO in my .mc file, but that just sends it to an
    > > additional account as well.
    >
    > Making assumptions that your sendmail is receiving bogus mail
    > for accounts that you have sendmail receive here is approach you
    > can take.
    >
    > Assume you have domains a.com b.com and c.com and your
    > local-host-names has those.
    >
    > Then you need to find out what users you have for each domain
    >
    > If you have curly larry and moe on a.com and no one else, then you
    > can build a virtualusrtable that looks like this.
    >
    > curly@a.com curly
    > larry@a.com larry
    > moe@a.com moe
    > @a.com nouser
    >
    > And the accnount 'nouser' will be in your /etc/mail/aliases
    > file and will look like this:
    >
    > nouser: /dev/null
    >
    > Run make in /etc/mail to create virtusertable.db and aliases.db
    > and that should get rid of the bogus names going to root.
    >
    > I find the virtualusertable to be quite handy for elminating a lot
    > of junk. It will only be a problem if you have a large user
    > base or lots of domains.
    >
    > Bill
    > --
    > Bill Vermillion - bv @ wjv . com
    >
    > 

    -- 
Bill Vermillion - bv @ wjv . com
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  • Next message: Bill Vermillion: "Re: Sendmail question"

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