How I block external mail

[ohm_g7]

If I don't want some users in zimbra can receipt mail from outside

I see this wiki RestrictPostfixRecipients - Zimbra :: Wiki
(I want to know,this wiki can solve my problem?)
If this wiki cannot slove, how I do?

Thank you for reply.

[phoenix]

If I don't want some users in zimbra can receipt mail from outside

I see this wiki RestrictPostfixRecipients - Zimbra :: Wiki
(I want to know,this wiki can solve my problem?)
If this wiki cannot slove, how I do?

Thank you for reply.

Use that wiki article to do what you want, do at least try it first.