How to block incoming emails

iali

Hello,
I know there is a procedure to block reception to some boxes:

I want to make it so that only the user max@company.com is able to send mail to the distribution list all@company.com.

so if mails are sent to all@company.com, either from internal or external users other than the above user, the message should be blocked and Undelivered Mail Returned to Sender

how can I do it?

thanks

esackbauer

You could create a global sieve rule.

iali

how?

esackbauer

In Mailcow UI go to E-Mail - Configurations - Tab Filters
You need to know how to use sieve syntax, pls. use Google, its not mailcow specific.