@Denise741 I also don't send that many emails: I don't want a ton of communication as a guest, so I keep it to a minimum for my guests. I recently booked a place for about 2 months out, and they have sent me no less than 9 messages about my trip, parking, etc. It's really irritating.
My email pattern:
Email 1 - sent at booking, thanking them for their reservation and letting them know that I'm available should they have questions or need any help with trip planning.
Email 2 - sent approximately 5 days before arrival, reminding them of check in and out times, letting them know where to park, addressing any other issues that may have come up, and again letting them know to reach out if they need anything.
Email 3 (potentially) - day of arrival - if the flat is ready early, I just shoot them a quick message letting them know that if they wish to check in early, the space is good to go and wishing them a good trip.
That's about it. Email 1 might be omitted/combined with 2 if the reservation is less than a week away.
I personally hate the request for review email from the host, and I'm actually less likely to review if I receive one. Your work as a host should speak for itself, and as @Anonymous said, they already get harassed enough about it by the Airbnb automated system.