Is Postmark down in the US?
Checks passingin the US, measured from Ashburn, San Jose, and Chicago
All 3 of our probes in the US, in Ashburn, San Jose, and Chicago, read checks passing when they last checked Postmark at Nov 5, 2026, 3:50 PM UTC.
Over the last 24 hours we completed 110 checks from Ashburn, San Jose, and Chicago and 109 answered cleanly, 99.09% availability.
Of the 7 other regions we check Postmark from, all 7 read checks passing right now.
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What our Ashburn, San Jose, and Chicago probes measured
Last checked Nov 5, 2026, 3:50 PM UTC.
Postmark from Ashburn, San Jose, and Chicago over the last 30 days
Over the last 30 days, Postmark answered our Ashburn probe in 740 ms on average, and 1 check in 20 took longer than 1,027 ms.
Over the last 30 days, Postmark answered our Chicago probe in 748 ms on average, and 1 check in 20 took longer than 987 ms.
Over the last 30 days, Postmark answered our San Jose probe in 953 ms on average, and 1 check in 20 took longer than 1,289 ms.
Ranked by average response time across the 10 cities we check Postmark from, Ashburn 4th, Chicago 5th, San Jose 6th; Toronto was fastest at 619 ms and Sydney slowest at 1,861 ms.
From Ashburn, San Jose, and Chicago we ran 3,521 checks of Postmark in 30 days, and 3,520 answered cleanly: 99.97% availability.
1 of the 30 days had at least one failed check. The weakest was Nov 4 (UTC), at 99.08% across 109 checks.
In Ashburn local time (EST), Postmark was slowest around 8 PM, at 1,181 ms on average over the last 14 days, and quickest around 11 AM, at 838 ms.
| Day (UTC) | Checks | Availability | Average response |
|---|---|---|---|
| Thu, Nov 5 | 71 | 100.00% | 977 ms |
| Wed, Nov 4 | 109 | 99.08% | 980 ms |
| Tue, Nov 3 | 109 | 100.00% | 1,028 ms |
| Mon, Nov 2 | 116 | 100.00% | 1,228 ms |
| Sun, Nov 1 | 119 | 100.00% | 1,113 ms |
| Sat, Oct 31 | 120 | 100.00% | 1,112 ms |
| Fri, Oct 30 | 120 | 100.00% | 1,051 ms |
| Thu, Oct 29 | 120 | 100.00% | 1,040 ms |
| Wed, Oct 28 | 119 | 100.00% | 1,120 ms |
| Tue, Oct 27 | 120 | 100.00% | 1,063 ms |
| Mon, Oct 26 | 120 | 100.00% | 1,111 ms |
| Sun, Oct 25 | 119 | 100.00% | 1,044 ms |
| Sat, Oct 24 | 120 | 100.00% | 1,039 ms |
| Fri, Oct 23 | 120 | 100.00% | 1,037 ms |
Postmark outages measured from the US
Our Ashburn, San Jose, and Chicago probes measured no confirmed Postmark outage in the last 90 days.
How the other regions read right now
Of the 7 other regions we check Postmark from, all 7 read checks passing right now.
| Probe city | Right now | Last 24h |
|---|---|---|
| Frankfurt | Checks passing | 100.00% of 34 checks |
| Tokyo | Checks passing | 100.00% of 20 checks |
| Toronto | Checks passing | 100.00% of 24 checks |
| London | Checks passing | 100.00% of 24 checks |
| Singapore | Checks passing | 100.00% of 24 checks |
| Sydney | Checks passing | 100.00% of 24 checks |
| São Paulo | Checks passing | 100.00% of 24 checks |
Other countries we check Postmark from
How we measured this
The US readings on this page come from RealUptime's own Ashburn, San Jose, and Chicago probes against Postmark's public endpoints. They are not user reports, and they are not Postmark's own status page.
See Postmark's full check readings, the 90-day history by region, or the outage tracker methodology.
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