What is Fastmail Bot?
Fastmail Bot is a fetcher operated by Fastmail. You can set up Agent Analytics to see when Fastmail Bot visits your website.
Category
| Operated By | Fastmail |
| Triggered By | Shared link |
| Used for AI Model Training | Not expected |
| Affects AI Chat & Search Visibility | Not directly |
| Expected To Follow Robots.txt | No |
Why Is Fastmail Bot Visiting My Website?
Someone shared a link to your page. Fastmail Bot fetched it to build a preview card, and each new share may trigger another request. A spike often means your content is circulating more widely.
Should I Block Fastmail Bot?
Usually not. Blocking Fastmail Bot may leave shared links without a title or image, making them less inviting to click. If it begins fetching at unexpected volume, try rate limiting before blocking it outright. For context, 7% of the top websites we track currently have robots.txt rules for Fastmail Bot.
Insights for Fastmail Bot
As of October 30, 2026, this data reflects agent visits measured across thousands of websites using Agent Analytics, combined with daily scans of the top 1000 websites and their robots.txt files.
Robots.txt Compliance
Country of Origin
Robots.txt Blocked Percentage
Fastmail Bot Traffic
Frequently Asked Questions
What Traffic Patterns Should I Expect From Fastmail Bot?
Fastmail Bot usually makes a single request within seconds of a URL being shared, without crawling further. Traffic rises and falls with sharing activity, so a widely circulated link can produce a sharp burst of fetches.
Does Fastmail Bot Follow Robots.txt Rules?
No. Fastmail Bot is not expected to follow robots.txt rules, so a disallow rule only communicates your preference. Enforce the block with firewall or server rules, then use Agent Analytics to verify that its requests stop.
Is Fastmail Bot Used for AI Model Training?
Not ordinarily. Fastmail Bot is not categorized as an AI training scraper or data provider, so AI model training is not its expected purpose.
Does Blocking Fastmail Bot Affect AI Search or Citations?
Not directly. Fastmail Bot's expected purpose is not to supply an AI search index or retrieve pages for AI-generated answers.
Does Fastmail Bot Access Private Content?
No. Fastmail Bot has no credentials and should access only the public URL and assets needed for a preview. It does not continue through the rest of your site.
How Can I Verify a Request From Fastmail Bot?
Agent Analytics tracks Fastmail Bot visits in real time. You can also check your server logs for requests whose user-agent string contains "Fastmail Bot". Look for a page and its preview assets being requested without follow-up navigation. Because Fastmail Bot does not publish a verification method, any client can claim its identity and a log match is only a clue.
How Is Fastmail Bot Different From Other Fastmail Agents?
Fastmail operates separate agents for different purposes, so each agent should be evaluated and controlled independently.
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