
Create an account at Fastmail - I used the Business Basic service at $30/year.I found a solution which meant I could use my own domain name. it only pushes new emails, folders/flagging etc need a manual fetch). For me I get reliable pushing/syncing on iOS Mail and Mac Mail - BUT bear in mind the restrictions listed at (i.e.Supports IMAP IDLE so you get push on Mac Mail, and Apple's own pushing service for iOS devices.This uses EWS too rather than EAS, but I found it to be much more reliable with pushing/syncing than Mac Mail - but I didn't like the app at all or want to pay a monthly fee for it. Tried using the new Outlook Mac app (part of Office 365).You can't turn to Office 365s IMAP support for Mac Mail support, since it doesn't support IMAP IDLE, so you get no pushing and would be on a manual fetch schedule.There are many reports of Mac Mail being rubbish with Exchange accounts. Found this to be totally unreliable - the syncing of read/flag status would often get stuck there was often a 5 minute delay in pushing etc. Mac Mail doesn't support Exchange ActiveSync (EAS), but uses Exchange Web Services (EWS) which isn't the optimum way of accessing an Exchange account.Supports Exchange ActiveSync so you get true push on iOS using the Mail app.Office 365 - I used Exchange Online Plan 1 If you use paid-for Google Apps you get Exchange support, which gives you push - but this doesn't support starring/flagging on iOS at all, which is a deal breaker for me.Supports IMAP IDLE so you get push on Mac Mail, but not on iOS which doesn't support it (unless you use the Gmail app which isn't great).I'd previously tried accounts from Gmail, Office 365 and iCloud (without Fastmail) with problems for various reasons.

I wanted push across all devices and also keep the Mac Mail app which I prefer over other apps I have tried.

The main reason I wanted to do this was that I'd be sat infront of my Mac, with the iPad and iPhone all nearby - an email would come in and ping on each device at a different time, and often a minute or two later on the Mac. I thought this information might be useful for others. and I've finally got it working well using iCloud and Fastmail. I have been after reliable push email, using my own domain name, across iOS and Mac, using the default Mac Mail app.
