Good point. I could have both notify@notify.startup.com and me@startup.com. That could mean I'd have two separate mail servers. I'm mostly worried about signup

Good point. I could have both notify@notify.startup.com and me@startup.com. That could mean I'd have two separate mail servers. I'm mostly worried about signup/+3 day/+7 day notifications to new users from damaging the spam reputation of me@startup.com when I attempt to email important people to discuss e.g. biz dev deals.