If you do not already have any accounts set up, it will prompt you to set up a new account. If you have a Basic plan, you can use Fastmail on a desktop web browser or the Fastmail app on any mobile devices, such as a phone or tablet. IMAP, SMTP, CalDAV, and CardDAV are available to Standard and Professional users only.

Users on a Basic plan will not be able to use Fastmail on third-party mail clients, or create app passwords. If you use your normal password or your Fastmail two step verification password on an external account, syncing to an external service won't work and you will see a password error. Mac Mail needs its own app password to access your information. If you'd prefer to configure your email manually, read on: The easiest way to configure Mail, Contacts or Calendars on a Mac is via our automatic configuration tool.

If you are using an older version of macOS, you can find the information you might be asked for on our server names and ports page. Previous versions of OS X are very similar, but may require more details to be entered manually. The instructions and screenshots in this setup guide are for macOS 10.11 (El Capitan).

Mail mac smtp server offline