Skip to content
Feed ReaderFeed ReaderCrawler Profile

FastmailUA — What It Is and How to Handle It

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.

Type
Feed Reader
Centinel Analytica · April 10, 2026

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.

Operator: Fastmail | Type: Feed Reader | Category: Feed Reader

FastmailUA is classified as feed reader. Use Centinel to monitor its behavior and decide whether to allow, block, challenge, or monetize its access to your content.

Centinel automatically detects FastmailUA using behavioral fingerprinting. When detected, you can allow it, block it, challenge it with an interstitial page, or set a per-request licensing fee — all enforced in real-time with under 2ms latency.

Find out what's hitting your site right now

Book a 30-minute demo and we'll run a live audit of your traffic before you commit to anything.

No credit card. No commitment. Just a clear picture of your traffic.

"We had no idea 40% of our traffic was AI crawlers until Centinel showed us. Setup took fifteen minutes and we were blocking unauthorized scrapers the same day."

Head of Engineering

Series B SaaS Company