So, I'm keeping my website with my registrar and moving the email to a better service (better than the awful cPanel one).I'm giving myself a crash course in A, AAAA, CNAME MX SRV TXT.Which records do I update?  Is it just MX and TXT, or more?I'm aiming for a seamless transition from one to the other.  
Which DNS entries need to be updated when moving email from one service to another?
web hosting;dns;email;mx