Yes I am using sendgrid or some other provider, they do all stuff for you. I like to have control over everything but when you have to send stuff from multuple domains and you have to ask other companies to add SPF and DKIM to their dns and deal with all bs with explaining how it works to other people just pay sendgrid.

If it is for your own domain and you don't have customers for which you send emails on their domains, it is quite easy to set up on your own.