I learned a ton about DKIM/SPF/DMARC when I switched over from Revue to MailerLite.
My hard work paid off as I managed to avoid the spam folder of doom (didn't escape the promotions folder though, but all good)
Open rates held steady but click rates took a hit. I guess people need a while to adjust. I'm loving the ability to view detailed statistics now on MailerLite's site and mobile app.
Happy I moved!