Too much information
Quotes, multiple phone numbers, every social network, and a banner all at once overwhelm the reader. Cut to what matters.
Images instead of text
Rendering the whole signature as one image breaks accessibility, blocks selectable text, and often fails to load. Keep text as text.
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Non-hosted or oversized images
Pasted images bloat the email and frequently don't display. Host them and set explicit dimensions.
Skipping mobile and dark mode
- Not testing narrow widths
- Ignoring dark-background contrast
- Fixed pixel widths that overflow phones
How KeyStamp helps
KeyStamp is an AI-powered email signature creator. Describe what you need and it generates a professional, email-safe signature you can refine visually — then manage branding, templates, and employee details from one place and export clean HTML that renders everywhere.
Frequently asked questions
What's the single most common mistake?
Is a full-image signature ever okay?
How do I catch these mistakes early?
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