I see that best-practice for domains using email should have a webmaster account (and the other normal accounts), but what if you don't have any email addresses for that domain? We have our primary business domain, but then we have subsites for other venues that are under our our control as well.
For instance the primary business is mainvenue.com. We also have parkvenue.com, yearlyevent.com, and majorevent.com (run every few years). Do I need a webmaster email setup for each of these domains? Also what if we have a domain that just redirects to our main website (e.g. secondaryvenue.com points to mainvenue.com/secondaryvenue). In all cases the contact email for employees are email@example.com.
Any assistance would be appreciated.