Re: [exim] How to stop spoofed "From" address

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Author: Dave Lugo
Date:  
To: Exim-users
Subject: Re: [exim] How to stop spoofed "From" address
On Sun, 14 Oct 2007 eximlearning@??? wrote:
>
> I get a lot of junk mail to my email address, me@???
> <mailto:me@mydomain.com>, with the header "From: me@???
> <mailto:me@mydomain.com>". Obviously the "From:" is spoofed, because I'm
> not sending the spam. The only way my server should except an email with
> the header "From:*@mydomain" should be if my authenticated MUA or a
> local script (my newsletter php program) sends it.
>


What does the 'From:...' of your email from exim-users look like?

(it should have your email address in it ;)


> There is no good reason I can think of that, another server should be
> sending me email "from" myself.


See above :)


> Is there a way to force Exim to deny
> these types of incoming junk emails at SMTP time? -- I assume this
> would be done with some form of ACL?
>


Yup, but it may cause problems with mailing lists, which is
why I never pursued it. I use a bunch of pre-DATA checks,
and spamd, which catch/block most of the spam I'd otherwise
get.


-- 
--------------------------------------------------------
Dave Lugo   dlugo@???    LC Unit #260   TINLC
Have you hugged your firewall today?   No spam, thanks.
--------------------------------------------------------
Are you the police?  . . . .  No ma'am, we're sysadmins.