Drowing in an ocean of email

[Ken Anderson]

The sendmail access db can contain a line for each user allowing mail,
and a default line denying mail like so:

TO:user1 at yourdomain.com     RELAY
TO:user2 at yourdomain.com     RELAY
TO:user3 at yourdomain.com     RELAY
TO:domain.com    ERROR:5.1.1:550 User unknown

See http://www.sendmail.org/m4/anti_spam.html#access_db_fine for more info.

Ken A
Pacific.Net


Michael Emdy wrote:

> 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
> (ie.
> 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
>
> finally
>
>>happens is the "Bad Mail" queues up on our MS Exchange server and
>
> cannot
>
>>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
>
> can
>
>>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,
>>
>>MTE
>
>
> --
> Julian Field
> www.MailScanner.info
> Professional Support Services at www.MailScanner.biz
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