I've seen high end quality adult sites hosted with M3Server
Managed Dedicated Servers and VPS Hosting by M3Server.com
I've heard MojoHost is great too
I have a managed dedicated server for paysites and a separate VPS for feeder sites, test sites etc.
I also don't host videos on my server anymore I have them on a separate server
on a CDN it makes things so much quicker.
I don't deliver email via my own server anymore I go through Google Business Email through their Gsuite services with domain masking and emails go through 100% of the time, that's just for my customer service emails that's not for site of the Newsletters.
I do my site update newsletters through Campaigner. They have great instant stats & graphs to see how effective the emails are, etc. and their deliverability is outstandingly awesome
