Preventing users from mailing out attachments selectively

[Shrenik Bhura]

Hi!

I was thinking of a peculiar requirement which could be of be very
useful with respect to e-mail security.

Is there a way in kolab to configure that only some designated users can
send mails with attachments of certain types or up to a certain size
while others can't?
Does anyone have experience with postfix policy banks as this is one way
I think this may be done?

Is there a way that every mail satisfying a particular criterion such as
having an attachment can be forwarded to a validation queue where once
validated the same can move ahead and be delivered?
May be sieve can help us do that? Can anyone pls validate my thought if
this has already been done on kolab.

Any other solutions/suggestions shall be highly appreciated.

Thanks & Regards,
SB