Why Add a Badge to Your Email Signature?
Every day, inboxes fill with messages that look personal but were drafted by AI. Sales outreach, client follow-ups, meeting recaps — an increasing share of professional email is now machine-generated, and recipients have started to notice. A 2024 survey by Floridi and colleagues found that over 60% of knowledge workers questioned whether at least some of the emails they received were written by a human. That skepticism erodes trust at the exact moment you need it most: when you are trying to build a relationship, close a deal, or deliver honest feedback.
Adding a "Written by Human, Not AI" badge to your email signature is a small, visible commitment that every word you send was composed by you. It tells clients, colleagues, and prospects that you invest real thought and time into your communication — that the advice in your email reflects your own expertise, not a language model's best guess. The effect is immediate: recipients stop wondering and start engaging.
For professionals in consulting, law, finance, healthcare, and creative fields, that distinction is especially powerful. Your words are your product. A badge does not just differentiate your emails from automated noise; it reinforces the personal brand you have spent years building. It takes less than five minutes to set up, costs nothing, and works across every major email client.
Best Badges for Email Signatures
Rectangular and compact designs work best in email signatures. These three badges are optimized for the limited space available.
How to Add a Badge to Your Email Signature
📧 Gmail
- Download your preferred badge (PNG format works best for email).
- Open Gmail and click the gear icon, then "See all settings".
- Scroll down to the "Signature" section.
- Click the image icon in the signature editor toolbar.
- Upload your badge image or paste the URL.
- Resize to approximately 150px wide for a professional look.
- Click "Save Changes" at the bottom of the page.
📨 Outlook (Desktop & Web)
- Download the badge in PNG format.
- Go to File > Options > Mail > Signatures (desktop) or Settings > Mail > Compose and reply (web).
- Create a new signature or edit an existing one.
- Place your cursor where you want the badge and click the image icon.
- Select your downloaded badge file.
- Right-click the image to resize — 120-150px width recommended.
- Save and set as your default signature.
🍎 Apple Mail
- Download the badge PNG file to your Mac.
- Open Mail and go to Mail > Settings > Signatures.
- Select the email account and create or edit a signature.
- Open the badge file in Preview, select all (Cmd+A), and copy (Cmd+C).
- Click in the signature editor and paste (Cmd+V) at the desired position.
- The image will appear inline — drag edges to resize as needed.
- Close Settings to auto-save.
⚡ Thunderbird
- Download the badge and host it online (or use the direct URL from byhumannotai.com).
- Go to Account Settings > select your account.
- Check "Use HTML" under the signature editor.
- Enter:
<img src="https://byhumannotai.com/icons/written_by_human_not_ai_light_rect.png" alt="Written by Human, Not AI" width="150"> - Click OK to save your settings.
Email Signature Badge Best Practices
Frequently Asked Questions
PNG badges display reliably across all major email clients including Gmail, Outlook, Apple Mail, Yahoo Mail, and mobile apps. We recommend PNG over SVG for email signatures because SVG support varies between email clients.
We recommend 120-180 pixels wide for email signatures. This provides enough visibility without dominating your signature. Most email clients let you resize images after inserting them.
Yes! Wrapping the badge in a link is a great idea. It lets curious recipients learn more about the movement. In most email clients, you can select the image and add a hyperlink to https://byhumannotai.com.
You can either host the badge yourself or link directly to our hosted versions at byhumannotai.com/icons/. Self-hosting gives you more control, while our hosted URLs are reliable and always up to date.
Explore More Badge Use Cases
Website & Blog Badges
Embed badges on your website or blog to signal authentic human-written content.
Badges for Writers
Show readers your articles and newsletters are 100% human-written.
Badges for Creators
Prove your designs and art are made by human hands, not algorithms.
Forum Badges
Add badges to your forum signature on Reddit, Discourse, and community platforms.
Free Download (All Badges)
Browse and download every badge design in SVG and PNG format, completely free.