Customer Advisory: Event Webhook Outbound IP Ranges Changes Tuesday, May 4, 2021 from 10:00am to 5:00pm PT

Sendgrid Outgoing Mail Gateway Original incident notification from SendGrid
These maintenances affect outgoing email on the Zenith Media Canada Network of servers, all outgoing email unless configured by the client to do otherwise rely on the smart host gateway of SendGrid.

May 4, 14:58 PDT
Completed - Due to an unexpected issue that our engineers are investigating, we will be postponing this change until further notice.

Please do not wait until then to add the new outbound IP address ranges if you are maintaining an allow list for the Twilio SendGrid Event Webhook:
167.89.116.0/24
167.89.117.0/24
167.89.119.0/24

As a note, IP address ranges can be subject to change without notice. Unless specifically necessary, we generally DO NOT recommend allow listing IP addresses. Instead, we recommend setting up features like signed webhook requests or OAuth 2.0 for securing your Twilio SendGrid Event Webhook.
https://sendgrid.com/docs/for-developers/tracking-events/getting-started-event-webhook-security-features/

May 4, 10:01 PDT
In progress - Event Webhook Outbound IP Ranges Change is currently in progress. This is a customer advisory. We have attempted to notify affected customers in our outreach campaign and this is an additional step to alert customers.

Apr 26, 10:48 PDT
Scheduled - Twilio SendGrid is changing its outbound IP address ranges for the Event Webhook on May 4, 2021 from 10:00am to 5:00pm PT. These are the new outbound IP address ranges for the Twilio SendGrid Event Webhook:
167.89.116.0/24
167.89.117.0/24
167.89.119.0/24

As a note, IP address ranges can be subject to change without notice. Unless specifically necessary, we generally DO NOT recommend allow listing IP addresses. Instead, we recommend setting up features like signed webhook requests or OAuth 2.0 for securing your Twilio SendGrid Event Webhook.
https://sendgrid.com/docs/for-developers/tracking-events/getting-started-event-webhook-security-features/

If you DO NOT currently maintain an allow list of outbound IP address ranges to receive event data from the Twilio SendGrid Event Webhook, NO ACTION IS NEEDED.

If you do maintain an allow list of outbound IP address ranges to receive event data from the Twilio SendGrid Event Webhook, you will need to add the above IP ranges to your allow list to avoid disruption to your webhook.

For clarification, this is a customer advisory. We have attempted to notify affected customers in our outreach campaign and this is an additional step to alert customers of the breaking change that will occur if the above IP ranges are not added to your allow list.

Interested in using SendGrid as your outgoing email strategy? Take advantage of our Cloud Website Hosting and our WordPress Website Hosting that are already fully integrated and configured to send using their global network. Interested in cPanel Anti-Spam Email Protection? if you're an Email administrator, that solution is for you.

Have an issue thats being affected by this maintenance? Open a Ticket and we can help you find a solution.

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