How to reject/detect emails claiming to be from my own domain?

[Jason Waters]

What do you use for an MTA?  I know with postfix you can use some smtp
restrictions to solve this problem.

On Fri, Dec 23, 2016 at 3:00 PM, Philip Parsons <pparsons at techeez.com>
wrote:

> I use Mailscanner and Send mail.  We have a few instances that we are
> receiving spam from jack at example.com to jack at example.com and it is
> getting through.  I have not seemed to find and answers as to how to stop
> this? Anyone got an Idea.  We already have SPF setup which helps but is not
> fully for this situation.
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> Thank you.
> Philip Parsons
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