Recall: Problem with MailScanner after upgraded RedHat version

[Lew Wolfgang]

On 09/02/2013 08:49 AM, Alex Neuman wrote:
> Recalling messages doesn't work with normal mailservers, only
> Microsoft Exchange servers.
>
> On Mon, Sep 2, 2013 at 5:38 AM, Thanakom Chinprasertsuk
> <thanakoc at itoneco.com> wrote:
>> Thanakom Chinprasertsuk would like to recall the message, "Problem with MailScanner after upgraded RedHat version".
>>

I just had an interesting thought.  Would it be possible to
spoof Microsoft recall messages?   Post-reception removal of
spam?  Denial of service?

Would it be legal (sender spoofing), even on your own servers?

Regards,
Lew Wolfgang