Restrict external domain ID's to send email to domain group addresses

[junaidakhan]

Hello,

I am using ME enterprise we need to restrict external domain user to send email to my domain group email addresses only
LAN users can able to send email to group addresses.

Regards,
Junaid

[pootwaddle]

I do this by using a list instead of a group, and you can then password protect the list.
(for instance the poster must then put [*password*] on the subject line to post)

At the very least you can limit a list such that only members of that list can post.