Drowing in an ocean of email

Michael Emdy michael at emdy.com
Mon Jan 12 16:27:58 GMT 2004

Is this the feature your referring to in Sendmail

>From my sendmail config:

FEATURE(`access_db',`hash -T<TMPF> -o /etc/mail/access.db')dnl

-----Original Message-----
From: Julian Field [mailto:mailscanner at ecs.soton.ac.uk]
Sent: Monday, January 12, 2004 10:57 AM
To: michael at emdy.com
Cc: mailscanner at jiscmail.ac.uk
Subject: Re: Drowing in an ocean of email

What you need is for sendmail to check for valid users at SMTP level
at RCPT time). This has, I believe, been discussed here before, and is
certainly documented in the O'Reilly sendmail books. So search the list
archive for RCPT and go and buy the O'Reilly sendmail book (latest
edition). It's the "access" database which you need to set up.

At 15:16 12/01/2004, you wrote:
>Help! We run an MS Exchange server internally and we have been plagued
>with high load and crashes until we implemented a linux gateway and
>chose to run MailScanner with Spam Assassin, RBL's (spamhaus and
>spamcop), and use the sa-learn script to train our bayesian DB.  Now we
>gained stability internally, but the # of msgs per day are steadily
>climbing and at this rate should overwhelm even our linux gateway.  We
>are taking upwards of 70-100k msgs a day for a company with just under
>1000 employees.  Our biggest problem currently is email destined for
>user email addresses that do not exist within our company.  What
>happens is the "Bad Mail" queues up on our MS Exchange server and
>be delivered and just gets shoved into a folder for the admin to deal
>with.  Which basically we just have to go in on an hourly basis and
>delete the mail.  Before figured out what was happening we had about
>25GB of mail to delete from the folder, now we do it hourly until we
>find a solution.
>I've configured Sendmail to not accept unresolvable domains, and I
>implemented the domain lookup as well.  We still seem to be getting
>slammed by something.  We are running out of options.
>Does anyone have any suggestions on what else we could do to start
>cutting down our daily msg intake?
>Any help would be greatly appreciated !
>Thanks in advance,

Julian Field
Professional Support Services at www.MailScanner.biz
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