I've used it for years, no issues with delivery to gmail or outlook.com / o365. They've got a bit about their delivery system mentioned here: https://mxroute.co

I've used it for years, no issues with delivery to gmail or outlook.com / o365. They've got a bit about their delivery system mentioned here: https://mxroute.com/docs/#/Presales/ipreputation https://mxroute.com/docs/#/Presales/ipreputation It's pretty basic in terms of webmail/core functionality but it receives and delivers mail well from the various IMAP clients I use, which is all I need.