SendGrid Incident History

Our engineers have monitored the fix and confirmed the issue with Twilio Console application login is now operating normally. This incident has been resolved.

Twilio Console application login is now operating normally. We will continue to monitor for system stability. If you experience continued login failures, please clear your browser cache and cookies. We'll provide another update in 1 hour or as soon as more information becomes available.

Twilio Console application login is now operating normally. We will continue to monitor for system stability. If you experience continued login failures, please clear your browser cache and cookies. We'll provide another update in 30 minutes or as soon as more information becomes available.

We are aware of login failures affecting the Twilio Console application. Customers are unable to access their accounts. Our team is actively investigating. We will provide another update in 30 minutes or as soon as more information becomes available.

We are aware of login failures affecting the Twilio Console application. Customers are unable to access their accounts. Our team is actively investigating. We will provide another update in 30 minutes or as soon as more information becomes available.

We are aware of login failures affecting the Twilio Console application. Customers are unable to access their accounts. Our team is actively investigating. We will provide another update in 15 minutes or as soon as more information becomes available.

The incident is resolved as block rates at Microsoft 365 have returned to normal levels. Users that continue to see elevated blocks at Microsoft 365 can submit delisting requests to Microsoft by sending an email with a copy of the error message, and the blocked IP address, to "delist@microsoft.com". Delisting requests can also be made via the Office 365 Anti-Spam IP Delist Portal at https://sender.office.com/ Users that are experiencing blocks at Microsoft Outlook Consumer domains can open a remediation request at http://olcsupport.office.com/

Beginning Aug 14 2026, ~21:45 UTC, we have observed an increase of 10-15% in blocks from Microsoft 365 impacting all Twilio Sendgrid IPs. We have confirmed with other industry contacts that they are observing similar behavior. The blocks are being observed at many domains hosted by Microsoft 365 and are not confined to a specific subset of recipient domains. Some users continue to see elevated blocks at Microsoft 365 domains. Microsoft has still not disclosed any outage with the service. The blocks are variation of the following: 550 5.7.511 Access denied, banned sender[x.x.x.x]. To request removal from this list please forward this message to delist@microsoft.com. For more information please go to http://go.microsoft.com/fwlink/?LinkId=526653. AS(1410) Users that are still experiencing these rejections should submit a delisting request per the instructions provided in the bounce message by sending an email with a copy of the error message, and the blocked IP address, to "delist@microsoft.com". Delisting requests can also be made via the Office 365 Anti-Spam IP Delist Portal at https://sender.office.com/ Additionally, we have observed an increase in blocks at Microsoft Outlook Consumer ("OLC") domains (e.g. 'hotmail.com', 'outlook.com'), which is a separate service from Microsoft 365, with syntax similar to the following: 550 5.7.1 Unfortunately, messages from [x.x.x.x] weren't sent. Please contact your Internet service provider since part of their network is on our block list (S3140). You can also refer your provider to http://mail.live.com/mail/troubleshooting.aspx#errors. Users experiencing these blocks should submit a delisting request to Microsoft here: https://olcsupport.office.com/ We have reached out to Microsoft to request an update on the status and we are still awaiting for a response. Until that time, we advise users to continue to escalate directly to Microsoft and request remediation.

Our engineers have monitored the fix and confirmed the issue with IP Retrieval Failing for EU Regional Customers has been resolved. All services are now operating normally at this time.

We are continuing to investigate this issue.

Our engineers are investigating an issue that began at 11:16 AM PDT where regional EU email customers are experiencing issues retrieving their IP addresses via API calls and the SendGrid UI. Please note that mail sending is not impacted. We will provide another update in 1 hour or as soon as more information becomes available.

We have deployed a fix to resolve the issue affecting customer signups when switching to SendGrid from Twilio. All signup flows have been verified and are functioning as expected. If you continue to experience issues, please contact support.

We have identified the root cause of the issue affecting the signup page for customers attempting to switch to SendGrid from Twilio. Our engineering team is currently working on applying a fix. We will provide another update as soon as more information becomes available.

We are aware of an issue affecting the signup page for customers attempting to switch to SendGrid from Twilio. Customers may experience inability to complete the product switcher signup flow. Our team is actively investigating. We will provide another update as soon as more information becomes available.

We are aware of an issue affecting the signup page for customers attempting to switch to SendGrid from Twilio. Customers may experience inability to complete the product switcher signup flow. Our team is actively investigating. We will provide another update as soon as more information becomes available.

Retroactive Incident - Our engineers have investigated and resolved the issues with delays with Legacy API marketing campaigns. On Friday July 31st from 9:52 AM PT to 10:12 AM PT a subset of customers may have experienced delays sending Legacy Marketing campaigns when using the API or SendGrid UI. The issue has been resolved and all impacted services are operating normally.

Our engineers have monitored the fix and confirmed the issue has been resolved. All services are now operating normally at this time.

At 4:21 PST our engineers have isolated the degraded region and removed it from load balancing and are now mitigated and observing. We will provide another update in an hour or as soon as more information becomes available.

Starting around 4:09 am PST on Jul/24, our engineers began investigating an issue related to low success rates in the us-west-2 region. Customer shouldn't experience impact. This does not impact mail send. We will provide another update in an hour or as soon as more information becomes available.

Our engineers have monitored the fix and confirmed the issue with shared Ips has been resolved. All services are now operating normally at this time.

Our engineers are continuing to monitor the fix. Please note that email requests are now being delivered as expected for customers using shared IPs.We will provide another update in 4 hours or as soon as more information becomes available.

Our engineers have identified the problem and implemented a fix and are monitoring system performance. We will provide another update in an hour or as soon as more information becomes available.

Our engineers have identified the issue and are working toward a fix. We will provide another update in an hour or as soon as more information becomes available.

Our engineers began investigating an issue with customers getting "no IPs are available for this account" when sending emails. Users may experience delays in email delivery.We will provide another update in 1 hour or as soon as more information becomes available.