>> I have a prolem with the new domain I added to the server and it is this >> new domain which is doing verification probes to my ISP. > >So, you need to add that domain to mydestination= parameter?
It's added to my vdomains file as per: virtual_mailbox_domains = /etc/postfix/vdomains (And Yes, I've done all the relevant "postmap" and "posfix reload" commands)