I got a domain, where i have the webserver and other services on virtualmin, but need to have for some reasons an external Emailserver somewhere else.
Therefore the emailfeature in virtualmin is disabled. The Webserver runs a CMS with a contact form, and whenever someone sends a message, it won't be delivered due the error like "cant deliver because it always bounces back to myself". Looks like the mailserver under virtualmin thinks the emailadress is local and does not resolve it via public dns to find out, that there is a different ip address for it.
How can i fix this? Or even better: What did i miss?
Thank you very much and best