Unknown user again

[Mike Kercher]

Gib Gilbertson Jr. wrote:
> Hi.
>
> At 10:18 AM 10/20/2004 -0700, you wrote:
>> Hi,
>>
>> I have been doing some digging on trying to understand how to fix my
>> "Unknown User" issue where Mailscanner is used as a gateway to other
>> mail servers.  My problem is that spam email destined to an unknown
>> user on another server serviced by my gateway, ends up piling up in
>> my queues and I end up sending an undeliverable message to innocent
>> bystanders who are unlucky enough to be in the forged from address.
>>
>> I have seen several solutions mentioned in this list, however, none
>> of them quite fit my environment.  I am running Mailscanner and
>> sendmail as a gateway.  The gateway serves as a spam and virus
>> filter for several diverse / non-integrated mail servers.  Here is
>> what I have found as possible solutions, but for some reason or
>> another it doesnt quite solve my solution in all cases.
>
>
> You could also use milter-ahead with sendmail. This is what I did and
> it cut e-mail going through the gateway from about 30k per day to
> under 10k per day. You can find out about it here:
>
>     http://www.milter.org/archives/001433.php
>
> Good luck
>
> gib

milter-sender also offers the call-ahead feature in addition to verifying
the sending email address is valid/deliverable.

Mike

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