[afnog] control forged emails using the sender_access on Postfix

[Kipkemoi Kibiego]

Are you using squirrelmail?

=====
Kipkemoi Kibiego
Msaidizi (Support)

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Peter Nyamukusa wrote:
> Hi folks,
>
> I am trying to control forged originating email address by using the
> sender_access file from my internal clients.
> At first all I did was simply list the domains I wanted to reject as below
>
> aol.com                 reject STOP SPAMMING We are watching you !!!!
> hotmail.com             reject STOP SPAMMING We are watching you !!!!
> bigfoot.com             reject STOP SPAMMING We are watching you !!!!
> yahoo.com               reject STOP SPAMMING We are watching you !!!!
> yahoo.co.uk             reject STOP SPAMMING We are watching you !!!!
> gmail.com               reject STOP SPAMMING We are watching you !!!!
> rock.com                reject STOP SPAMMING We are watching you !!!!
>
> now it look like the spammer keeps changing his domain so I have decided to
> instead block all domains and only just allow my domains. I have put this as
> the first entry 
> *   REJECT
> Mydomain1.com OK
> Mydomain2.com OK
> ......Etc
>
> But it looks like the system is now completely open is there a way by
> default to block all domains them allow only your domains, I have googled
> around with no success, I trying to avoid having to manually add the
> rejected domain every time it changes.
>
> Thanks in advance
>
> Cheers
>
> Peter Nyamukusa
> MCSE, Linux+ CCIP, JNCIS, A+
>
>
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