i default to defalt Stan R. for tooling - I know how they're building and they're simplifying this tremendously. That said, if you don't need much you can even use something as simple as calendly or cal.com to route
I wanna shout out Namit J. who I use for inbox infra - he's been helping me set things up always so wanted to give him love. My zapmail inboxes burned multiple times and his stmp server crushed gmail or Microsoft inboxes