There's been a couple short downtimes, always documented/well-communicated on their Twitter feed. I think I've only ever been able to not get into my email once... and it was fixed in a few minutes.<p>And outside of general service reliability, their support team is top notch. I can't say enough about being able to file a ticket on a problem with my email service and hearing back from a real person about it.<p>Also: <a href="https://www.fastmailstatus.com/" rel="nofollow">https://www.fastmailstatus.com/</a>