Unclear & DANGEROUS configuration instructions
😡 "Thanks" for the unclear message about MX configuration! It messed up my email setup so I've lost 2 days of emails!!!
OK, it says "if you've MX records for @example.com"… but I don't have that kind of records because it's on a managed server that probably do that in the background.
From a UX point of view, don't put first in bold "recommended for all domains, even if you are only sending messages" then discretely after "don't do it if it can mess up your emails"… that should be displayed in BOLD RED!!! Attract the attention of the user on what could be VERY DAMAGING. UX 101.