Michael Fox: > Jun 30 20:12:31 myhost postfix/submission/smtpd[28379]: warning: Unable to > look up MX host for my.virtual.domain: Host not found, try again > > Why is this happening?
Because YOU configured something that requires MX lookups:
check_*_mx_access, reject_unknown_sender_domain,
reject_unknown_recipient_domain, and so on.
Wietse
