If that is the problem you are trying to fight, then follow the link to the FAQ
and read why it's bad to whitelist your own address or domain.
You could potentially configure your MTA to add some customized header to your
outbound mail, and then set up a "headers" rule on your incoming filter.
Configure the rule so that if it sees that special header to automatically
accept the message. That way, any mail that appears to come from your own
domain but is forged will not have the header, and you can simply throw that
message away. There are several ways you can identify mail that comes from your
own server.
You could simply write a headers rule that looks for "Received: from
mail.myvest.com (dsl092-024-162.sfo1.dsl.speakeasy.net" and automatically
accept it without challenge. But if the mail is locally delivered, you may
never see that part. Instead, you would probably still see a header that look
like "Received: from [192.168.0.202] (eeyore.corp.myvest.com
[::ffff:192.168.0.202])" which is the source header before your mail even
leaves your server.
----- Original Message ----
From: Julie S. Lin <[EMAIL PROTECTED]>
To: David Hoffman <[EMAIL PROTECTED]>
Cc: tmda-users@tmda.net
Sent: Monday, December 4, 2006 2:08:30 PM
Subject: Re: filter by mailserver
Hi
what yer saying is absolutely correct, hence my desire to filter by
specifying a mail server
is this possible? i'm hopping spammers can't easily forge outgoing
server identity
David Hoffman wrote:
> If what you mean is that spam is getting through because the spammer
> forges an address that is on your whitelist, then the simple answer is
> don't put that address in your whitelist.
>
> If you put your own address into your whitelist, or your own domain,
> then any spammer can forge it, and it will go through.
>
> See:
> http://wiki.tmda.net/TmdaFaq#head-e81137818ea55d7e15d5822687715793af7062ea
>
>
>
> ----- Original Message ----
> From: Julie S. Lin <[EMAIL PROTECTED]>
> To: tmda-users@tmda.net
> Sent: Monday, December 4, 2006 1:14:12 PM
> Subject: filter by mailserver
>
> Hi
>
> is there a way to filter by originating mailserver?
>
> the rule "from [EMAIL PROTECTED] ok" still allows spam clever enough to
> forge the from field.
>
> i'd like to write the filter such that mail originating from
> "[EMAIL PROTECTED]" is OK.
>
> or have spammers figured out how to forge originating mail server
> identity too?
>
> J
>
> _____________________________________________
> tmda-users mailing list (tmda-users@tmda.net)
> http://tmda.net/lists/listinfo/tmda-users
>
>
> ------------------------------------------------------------------------
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