After 9 Years, I've moved on. My story is simple. I was a 16 year old kid, running a boring wordpress website on GoDaddy cheap-as-**** hosting. After experiencing issues with load from a few projects that brought traffic, I moved up to Media Temple. Started with their Grid Service which was mostly wonderful and everything I needed for 8 years... even after GD bought them out.
At some point last year, my Grid was overloaded with the websites I had running (According to MT they were poorly optimized causing issues), however they suggested I not only remedy that but move up to a DV (Managed VPS Hosting). I agreed, as I was bringing on more traffic.
Since that move, my life turned into a living hell on the web.
My VPS ran Plesk (I was unfamiliar with it, but learned semi-quickly), and worked "OK" until an update in January 2018. Suddenly, my SpamAssassin decided to delete every email incoming that was possibly spam (Rather than modify the subject line to include ****SPAM****). Upon contacting Support (Which used to be legendary for how amazing it was...) I was greeted with "You are now first in line" for 45 minutes of hold time. A "tech" answered, and after a TWO HOUR support call... Concluded nothing was wrong with the options inside of Plesk. Nothing was malfunctioning. And sent me support topics on activating SPF and Domain Key to my DNS. Because, yeah, that has everything to do with my Spam Filter becoming the email terminator.
6 Months from that day (Where I ended up disabling the spam filter fully, relying on the built in filter with Thunderbird) I finally have migrated my entire company to InMotionHosting. You should also move. Anywhere.