Krystal

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Issues with outbound mail sending to Microsoft services email addresses
Resolved·Degraded performance

We're seeing emails to Microsoft services returning to normal overnight and this morning, with no further rate-limit related errors. The majority of emails in this state should retry but customers can reach out via help@sirportly.com if they require any specific messages to be checked.

At the same time, we've seen a number of posts online relating to the same rate-limit issue - suggesting a more broad problem at Microsoft's end affecting multiple sending services.

Thu, Feb 26, 2026, 10:16 AM
(7 months ago)
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Affected components
Feb 25, 2026, 10:34 AM
Feb 26, 2026, 10:16 AM
Sirportly
Updates

Resolved

We're seeing emails to Microsoft services returning to normal overnight and this morning, with no further rate-limit related errors. The majority of emails in this state should retry but customers can reach out via help@sirportly.com if they require any specific messages to be checked.

At the same time, we've seen a number of posts online relating to the same rate-limit issue - suggesting a more broad problem at Microsoft's end affecting multiple sending services.

Thu, Feb 26, 2026, 10:16 AM

Identified

We are continuing to see both new, and retried mail messages rejected by Microsoft, with no sign yet of successful deliveries.

This is still limited to Microsoft email services only, and other mail services are all delivering successfully.

Wed, Feb 25, 2026, 03:02 PM(19 hours earlier)

Identified

We're aware of an issue with a number of outbound emails sent via Sirportly, to Microsoft services email addresses, i.e. outlook.com, live.com and hotmail.com/co.uk .

The errors provided by their mail servers suggest a rate-limiting issue but as this is a false-positive due to no detected increase in mail rates, or any unexpected / unsolicited mail being sent from any customers, we've requested removal directly using their SNDS system.

We'll provide further updates as soon as we have them.

Wed, Feb 25, 2026, 10:34 AM(4 hours earlier)