CHANGE VIRTUALMIN USER.DOMAIN TO USER@DOMAIN

VirtualMin has some pesky things. Here is a simple way to revert back to the older, better way of doing things

To change from user.domain logins back to user@domain logins

Login into VirtualMin

Click System Settings

Then Server Templates

Now select the Mail for Domain template

Scroll to the bottom and change the section Format for usernames that include domain

From user.domain

to user@domain

Now you are back to normal