Studentnet incident
Email notifications to some Microsoft mail servers being rate limited
Studentnet experienced a notice incident on January 8, 2026 affecting Studentnet AuthentID MFA, lasting 1d 1h. The incident has been resolved; the full update timeline is below.
Affected components
Update timeline
- investigating Jan 08, 2026, 08:22 PM UTC
We are receiving alerts from Sendgrid that some Microsoft mail receiver servers are rate limiting are attempts to send mail to them. We have commenced a process with Microsoft to lift the rate limit being applied to us. This is only affecting non-commercial Microsoft email addresses and only affecting Microsoft email addresses(eg hotmail.com, live.com, msn.com and outlook.com). Non-commercial Microsoft mail servers are the smallest category of mail servers receiving our email traffic. Microsoft 365 mail servers are unaffected as are all other mail services(gmail etc). We estimate that this is affecting about 10% of our mail delivery sends.
- investigating Jan 09, 2026, 09:39 PM UTC
We are continuing to investigate this issue.
- investigating Jan 09, 2026, 09:40 PM UTC
We are continuing to investigate this issue.
- resolved Jan 09, 2026, 09:41 PM UTC
This incident has been resolved.