Zendesk is raising the security floor for incoming email. Beginning September 23, 2026, Zendesk will start automatically enabling its Minimal sender authentication standard for accounts that currently have email authentication disabled. Accounts that already have sender authentication enabled can no longer disable it through Admin Center. From a security perspective, this makes sense. From an… Continue reading Zendesk Is Making Sender Authentication Mandatory. Public-Facing Support Teams Should Pay Attention.