FastmailUA is Fastmail's content fetcher and image proxy service that retrieves external images and content for email security. It protects users from tracking pixels and malicious content by proxying external resources through Fastmail's secure servers.

At a glance

Operator: Fastmail
Type: Feed Reader

How Centinel checks it

User agent: The request calls itself this crawler. Anyone can send the same string.

FastmailUA publishes nothing Centinel can check a source against, so a match reports the name and leaves the source unconfirmed. The match tokens, verification domains, and address feeds are not published here.

Allowing or blocking it

The crawler object in the /validate response sets access_allowed to true only for a verified source that your tenant allowlists. A policy rule can allow or block this crawler by its category, Feed Reader.

Back to the crawler catalog