2009/10/22  <[email protected]>:
>> From: Brad Melanson
>
>> local authenticated users are able to send email as any address they wish,
>> including other local users. This poses a security concern for my clients
>> and was hoping to plug this hole.
>
> Which exactly security concern?

Pretty obviously - an authenticated user spoofing another (possibly
authenticated) user's email. The OP has been offered a simple ACL fix
for this earlier in the thread.

-- 
Peter Bowyer
Email: [email protected]
Follow me on Twitter: twitter.com/peeebeee

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