Microsoft announce that High Volume Email (HVE) is now generally available in Exchange Online.

It’s a way for applications and devices to send large volumes of internal email reliably and securely without impacting user mailboxes or Exchange Online service health. Usage will be metered from June 1, 2026 with pricing set at $42 per one million recipients.

Find the announcement with some common usage scenarios listed here: https://bit.ly/4eC2hyh, and the (useful) Learn documentation detailing how to set up HVE accounts here: https://bit.ly/3QndatS.