What does mail.google.com mean as a referrer?
23 September 2026 · by Nordva, who make Nordva Launch
The short answer
It means someone clicked a link in an email they were reading in Gmail in a web browser rather than in an app. The browser passes on only the host, mail.google.com, not the message or the inbox. So you know the visit came from an email read in Gmail, but not which email, who sent it or why.
- Referrer
- mail.google.com
- What sends it
- A link clicked in Gmail in a web browser
- Nordva Launch counts it as
Why visits show mail.google.com
Gmail in a browser is a website like any other, and it lives at mail.google.com. When someone clicks a link in a message, the browser tells your site where the visitor came from. Unless a page asks for something else, browsers use the policy strict-origin-when-cross-origin, which sends only the origin (the scheme and host) to a different site. The rest of the address, which in Gmail points at a particular inbox and message, stays behind.
That is why you see the bare host and nothing else. Clicks from the Gmail app on Android arrive differently, as a package name; that has its own page.
Does Gmail change your links?
Google says it adds link protection to all official Gmail clients, the web included, and that in a test for other mail apps you may see links wrapped in the form https://www.google.com/url?q=ORIGINAL_URL. Google doesn’t document what the protection does to the referrer your site receives, so don’t build reports on it. Tags inside your own link are the part you can rely on.
What it hides
It tells you the visit came from someone reading email in Gmail. It doesn’t tell you:
- which email: your newsletter, a launch announcement, a receipt, a cold email or a friend forwarding your link all look the same,
- who sent it: you, a partner, or a newsletter that mentioned you,
- which link in the email was clicked.
The same Gmail account read in another mail app, or in the Gmail app on a phone, reaches you under a different referrer or none. mail.google.com is only the part of your email traffic that was read in a browser.
How to see which email it was
Tag every link you put in an email. Tags are part of the address, so they arrive whichever mail app is used and whatever referrer is sent:
https://example.com/pricing?utm_source=newsletter&utm_medium=email&utm_campaign=2026-09-launch&utm_content=header-buttonUse a different utm_campaign for each send and utm_content for each link, if you want to know which button worked. If someone else sends the email (a sponsorship, a partner), give them a tagged link with their name as utm_source.
With Nordva Launch
Launch files mail.google.com under email, together with Outlook on the web, Yahoo Mail, Proton Mail, Fastmail and the Android mail apps it recognises. A tagged link with utm_medium=email or utm_source=newsletter also counts as email, and one with a paid medium such as cpc counts as paid.
When Launch is the wrong tool
If you only send one kind of email, knowing that visits came from Gmail may be enough, and most analytics tools already count it as email. Launch is for when you want to know which email brought the people who signed up and paid.
- What is mail.google.com referral traffic?
- Why does Gmail show up in my referrers?
- Which email sent visitors from mail.google.com?
- MDN: Referrer-Policy, the default strict-origin-when-cross-origin sends only the origin to another site (read 23 September 2026)
- Gmail Help: click-time link protections, added to all official Gmail clients including the web (read 23 September 2026)