It's my first time configuring such a system: our website is hosted at Host1, our mails at gmail. And I also just setup Virtualmin to run several apps under subdomains at Host2.
I have emails for subdomains working fine. But when an email from a subdomain is sent to the main domain, ie... from firstname.lastname@example.org to email@example.com, the local postfix says the alias is not know to the local server...
How can I circumvent this situation and see mails for domain.com be relayed to the outside world?
Thank you for any pointer.