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Is Fastmail Down?

No — Fastmail is up

Reachable from all 8 checked regions

Average response time: 515ms

Last checked · checks run every 6 hours

Official status page: https://fastmailstatus.com

Fastmail uptime

100%
Last 7 days
100%
Last 30 days
100%
Last 90 days
358ms
Avg response, 30 days

Measured from multiple regions every 6 hours. Percentages count only checks that returned an availability answer — 20 days measured so far. A dash means that window does not yet hold enough measured days to publish a figure.

30-day history

20-day clean streak
Aug 22: no data
Aug 23: no data
Aug 24: no data
Aug 25: no data
Aug 26: no data
Aug 27: no data
Aug 28: no data
Aug 29: no data
Aug 30: no data
Aug 31: no data
Sep 1: 100.00% uptime, 23 checks
Sep 2: 100.00% uptime, 30 checks
Sep 3: 100.00% uptime, 27 checks
Sep 4: 100.00% uptime, 31 checks
Sep 5: 100.00% uptime, 32 checks
Sep 6: 100.00% uptime, 31 checks
Sep 7: 100.00% uptime, 28 checks
Sep 8: 100.00% uptime, 23 checks
Sep 9: 100.00% uptime, 44 checks
Sep 10: 100.00% uptime, 37 checks
Sep 11: 100.00% uptime, 32 checks
Sep 12: 100.00% uptime, 32 checks
Sep 13: 100.00% uptime, 32 checks
Sep 14: 100.00% uptime, 32 checks
Sep 15: 100.00% uptime, 31 checks
Sep 16: 100.00% uptime, 32 checks
Sep 17: 100.00% uptime, 32 checks
Sep 18: 100.00% uptime, 32 checks
Sep 19: 100.00% uptime, 32 checks
Sep 20: 100.00% uptime, 16 checks
Aug 22 Today
No downtime Partial Downtime Not measurable No data

Reachability by region

Each region runs its own request from a different part of the world. A service can be up for one continent and down for another, which is usually the first sign of a routing or CDN problem.

gru
656ms
DNS 270ms TCP 118ms TLS 120ms TTFB 627ms
iad
85ms
DNS 56ms TCP 7ms TLS 11ms TTFB 82ms
jnb
1002ms
DNS 243ms TCP 234ms TLS 237ms TTFB 949ms
lax
293ms
DNS 65ms TCP 69ms TLS 73ms TTFB 279ms
lhr
269ms
DNS 19ms TCP 76ms TLS 78ms TTFB 249ms
nrt
844ms
DNS 277ms TCP 172ms TLS 176ms TTFB 799ms
ord
168ms
DNS 93ms TCP 22ms TLS 24ms TTFB 162ms
sin
809ms
DNS 46ms TCP 236ms TLS 237ms TTFB 755ms

What Fastmail does

Fastmail is a paid email host used by individuals and small businesses who want mail on their own domain without advertising. It serves a web client and mobile apps, and supports standard protocols directly: IMAP and POP for mail, CalDAV for calendars and CardDAV for contacts, so third-party clients connect to it without a bridge.

What an outage looks like

Mail clients report authentication or connection errors while the web client may still load, or the reverse. Fastmail tracks Mail delivery separately from Mail access, so incoming messages can stop arriving even though the mailbox opens normally and old mail reads fine. Calendar and contacts sync fail independently of mail, so a phone can show stale calendar entries while email flows.

What to do about it

Check fastmailstatus.com, which lists Login and sessions, Mail delivery, Mail access over IMAP and POP, Calendar over CalDAV, File storage over WebDAV, Contacts over CardDAV and the web client as separate entries with 90-day uptime figures. Match the entry to the symptom rather than the product. Senders to your address generally retry for hours, so mail sent during an incident usually arrives afterwards.

Is it down for everyone, or just you?

If this page says Fastmail is up but it is not loading for you, the problem is between you and them. Run a check against any URL from up to 18 cities across three regions to find out where it breaks.

Test it yourself

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Fastmail outage FAQ

Is mail lost if Fastmail is down when someone sends to me?
Usually not. Sending mail servers queue and retry for hours or days when a destination is unreachable, which is standard SMTP behaviour rather than anything specific to Fastmail. Mail sent during a delivery incident normally lands once the service recovers. If a sender received a bounce message rather than silence, ask them to forward it, because a hard bounce means something different.
My email client fails but webmail works. Is Fastmail down?
Partly, and this is a documented split. Fastmail reports Mail access over IMAP and POP as a separate component from the web client and mobile app. When that component is affected, desktop clients cannot fetch mail while the web client signs in and works. Check the IMAP and POP entry specifically rather than concluding your client is misconfigured.
Why can I stay signed in but not sign in again?
Login and sessions is its own component on the Fastmail status page. When it is affected, existing sessions keep working because they are already authenticated, while new sign-ins fail. That makes an incident look like it only affects some people, when the real split is between those already signed in and those who signed out or opened a new device.
Does a Fastmail outage stop my calendar and contacts syncing?
It can, and separately from mail. Calendar over CalDAV, Contacts over CardDAV and File storage over WebDAV are three distinct components. A phone can keep sending and receiving email while the calendar quietly stops updating, which usually shows up as a colleague's new meeting never appearing rather than as an error.
Where can I see how reliable Fastmail has been?
Fastmail publishes a 90-day uptime percentage next to each component on its status page, so you can compare mail delivery against login or calendar over the same window. That is a vendor self-report measured by the vendor. The measurement on this page is taken independently from several regions, which is why the two figures may not match exactly.

How we measure this

  • We request Fastmail's public endpoint every 6 hours from Fly.io regions across six continents — the most recent check ran from 8 of them.
  • A region counts as down only when it gets no usable HTTP response. A 403 or 429 means the origin answered and refused us, which we report as blocked, never as an outage.
  • A single failing region is treated as probe noise. We only change the verdict when two consecutive cycles agree.
  • Response times average only the regions that actually served the page, so a timeout never inflates the number.
  • Where Fastmail publishes an official status feed we read it too. An all-clear from the vendor can soften an unconfirmed degradation; a vendor-declared outage only worsens our verdict when our own checks corroborate it.

Get alerted when Fastmail goes down

This page refreshes every 6 hours. Your own monitors run as often as every 30 seconds, from up to 18 cities across three regions, and tell you the moment something breaks.

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