New Webhook Available: sasl_block

As part of improving our communications around email abuse detection and blocking, we have developed an sasl_block event webhook to notify clients when a domain’s record is updated with either a blocking or an unblocking action. This webhook will begin sending on Tuesday, 11 February 2025 for new changes to our email blocking records. If the expires value is in the future, the domain is currently blocked from sending email via the WP Cloud servers.

Data sent via the webhook will include:

{
    "event" => "sasl_block",
    "timestamp" => 1721230550,
    "atomic_site_id" => 123456789,
    "data" => [
        "domain" => "example.com",
        "reason" => "Optional reason for block, may not be included",
        "expires" => "2026-02-04 15:42:14"
    ]
}

This may be used by clients to initiate contact with their customers about appropriate spam and abuse prevention techniques. As these webhooks will be sent on record change (which may include extending an expiration for which a hook may have already been sent), it is important to review the expires date, as well as ensure that customers are not contacted too frequently based on webhook receipt.