MailScanner custom header modification

[Jerry Benton]

Be careful this this approach. This is especially true if you have multiple servers handling the same email and have some sort of HA in place.

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Jerry Benton
www.mailborder.com



> On May 21, 2015, at 2:48 PM, Shawn Iverson <IversonS at rushville.k12.in.us> wrote:
> 
> Why not just reject external mail addressed to your domain instead?
> 
> If it has your address on it and it is not coming from you, then it is not yours.
> 
> Postfix/Exim/etc. support this feature.
> 
> On Thu, May 21, 2015 at 6:00 AM, Арсений Черняков <a.v.chernyakov at gmail.com <mailto:a.v.chernyakov at gmail.com>> wrote:
> Hello.
> We've deployed MailScanner as an email relay and virus/spam scanner.
> We've encountered some messages that sent from various external servers with "from" header set to our domain and rcpt-to set to various free mailservers such as outlook.com <http://outlook.com/>. There is a plugin to spamassassin that detects such messages and increaces spam score.
> There is need to somehow modify Subject of such emails with [FRAUD] stamp (for example) like SpamAssassin modifies it with [SPAM] stamp. Is it possible to do with MailScanner?
> Or maybe there is another way to do it?
> 
> Thank you.
> 
> 
> 
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> 
> 
> 
> 
> 
> -- 
> Shawn Iverson
> Director of Technology
> Rush County Schools
> 765-932-3901 x271
> iversons at rushville.k12.in.us <mailto:iversons at rushville.k12.in.us>
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