Why I power off PC .I have only set test@mydow.com in this pc
but I watch Mail Queues in Zimbra Server by admin user.
aslo see from test@mydow.com sent mail to webmaster@schwr.com ect.

please see under info.Thanks.

receiver domain origin IP(127.0.0.1) sender domain (mydow.com) receiver address(webmaster@schwr.com) sender address (test@mydow.com)