Email hosting

I'm looking around for NZ based companies that offer email hosting with billing in NZD. The use case I am thinking of is organisations/people who have their own domain name and want to use it for emails, and would prefer to pay in NZD. The email service should at the least offer both IMAP/TLS and Webmail/HTTPS access with a decent UX along with an outbound SMTP/TLS gateway. Ideally it could support iOS push notifications for IMAP and have a decent amount of storage (>1GB per mailbox).

Basically I am looking for a local equivalent to FastMail. Maybe without the 25GB storage. :P

Before anyone suggests self-hosting, I am currently hosting my own mail sever on my VPS and have used it to host emails for various non-profits in the past. In recent years however I've off-loaded them to other providers and their experience with other providers have been variable. Some have opted (against my advice) to just go for a Gmail account (with 'reply to' their domain names). Hence I am looking for a reliable NZ firm to recommend to NPOs and other individuals who want an easy-to-use managed email hosting using their own domain name.

I've had a quick look and found:-

Net24$5+GST monthly500MB storage5 mailboxes

OpenHost$2+GST monthly1GB storage5GB traffic10 mailboxes

Ramsu$4+GST monthly500MB storage1 mailbox

Umbrellar$5+GST monthly1GB storage1,000 email deliveries1 mailbox

Would love to hear feedback from anyone who uses any of the above or other similar services. I'm particularly interested in OpenHost which has a good price for the storage they offer (and they also offer more cost tiers above that price for any future expansions).

If you are a user could you feedback on the following:

- Do they offer TLS for both IMAP and SMTP connections? Bonus marks if they enforce TLS on both!

- Which Webmail application do they use? Do you like it? Why/why not?

- How good is their spam filtering? Do they filter outright or to a separate mailbox?

- Do they support IMAP IDLE?

- Do they support iOS push notifications for IMAP mailboxes? (i.e. via ActiveSync or otherwise)

Thanks in advance for your feedback. :)