restrict who can send emails to an email address

[Eric Luyten]

On Thu, August 13, 2015 1:53 pm, Sunny wrote:
> Hi,
>
>
> Is there an option in cyrus that can restrict who can send emails to an
> email address?
>
> e.g
>
> the mail alias everyone at mycompany.com contains all the members in the
> organisation - I would like to restrict who can send emails to
> everyone at mycompany.com, ideally granular control i.e. boss at mycompany.com
> pa at mycompany.com or if that's not possible only internal users *@mycompany.com
> (i.e. no external address is allowed to send to
> everyone at mycompany.com).


Correcting my earlier post : you could write Sieve rules for that Cyrus
mailbox that bounce/drop/file messages not carrying a From/Sender in the
local domain.

Please note that a From/Sender line is easily forged.


Regards,
Eric Luyten, Compuitng Centre VUB/ULB.