Every MailHow account includes calendar and address-book sync over the open CalDAV and CardDAV standards. The same protocols Apple and Fastmail use. Nothing to enable; point a client at the server and it appears on all your devices.
| Setting | Value |
|---|---|
| Server | mail.mailhow.com |
| Username | your full MailHow address |
| Password | a device password (Settings → Security) or your MailHow password |
- iPhone / iPad / Mac: Settings → Calendar/Contacts → Accounts → Add Account → Other → add a
CalDAV(calendar) orCardDAV(contacts) account with the settings above. Discovery does the rest. - Android: install
DAVx⁵, add an account with base URLhttps://mail.mailhow.com. - Thunderbird: New Calendar → On the Network, or Address Book → New CardDAV Address Book, with the same server and login.
The web app doesn't render calendars yet. This is device sync, arriving in the apps you already use.