Yes, and it's excellent. I took their 60-day trial and switched from Gmail. I was initially cautious because I didn't think anyone had improved spam filtering

Yes, and it's excellent. I took their 60-day trial and switched from Gmail. I was initially cautious because I didn't think anyone had improved spam filtering and search as much as the Gmail team, but – for me – Fastmail is better at both. They have a pretty powerful search system like Gmail's: https://www.fastmail.fm/help/mailbox_searching.html https://www.fastmail.fm/help/mailbox_searching.html and their spam filter is excellent. The whole experience is faster than Gmail, you have much more space to write and read email, and there's no nagging feeling that, by using the service, a company is slowly building a profile on you. Migration-wise, they have an IMAP importer which works great. You can tell it which labels/folders to import; their defaults for Gmail worked fine for me. Their new mobile web app is very impressive too – it feels native (minus the notifications, which I've set up by forwarding mail headers only to an IFTTT recipe that sends notifications via Pushover on iOS). I now use Fastmail's mobile app instead of iOS Mail. http://blog.fastmail.fm/2013/10/21/faster-than-native-introducing-fastmails-new-mobile-web-interface/ http://blog.fastmail.fm/2013/10/21/faster-than-native-introd... The only things I missed from Gmail were the "Undo Send" feature, which I've learned to live without, and the automatic "Promotions" inbox filter; Fastmail has automatic filters for "Personal", "Notifications", and "Mailing lists", but not one for marketing HTML email. I've unsubscribed from most lists and resubscribed using plus addressing – just create a folder named 'News' and subscribe to any lists using you+news@example.com. Newsletters then skip your inbox and fill the news folder. This works with your custom domains too – not just the Fastmail-assigned domain. Additional domains (they call them "virtual domains") are easy to set up, and they provide DKIM and SPF entries for each domain you add for you to copy into your DNS records. https://www.fastmail.fm/help/quick_tours_setting_up_domain.html https://www.fastmail.fm/help/quick_tours_setting_up_domain.h... Their documentation is _really_ thorough, so I haven't needed to bother their support team; hopefully I can keep it that way – at $40 a year for the Enhanced personal email service (which gives you multi-domain support and now 15GB of space), I would hate to be a burden on them.