I'm not sure what you mean re: "how they host email". IMAP is a higher-tier feature. I'm using them for SMTP forwarding to my self-hosted IMAP server, so not ha

I'm not sure what you mean re: "how they host email". IMAP is a higher-tier feature. I'm using them for SMTP forwarding to my self-hosted IMAP server, so not having IMAP from them has never been an issue. They have AtMail and Roundcube available if you elect to use them for email storage. I've used neither with them, though I do want to spin up a Roundcube installation for myself when I can find some time to tinker with it.