Email Signature Best Practices: Do's and Don'ts for 2026
Avoid common email signature mistakes. Learn the best practices for design, content, mobile optimization, and brand consistency.
Keep It Under 4 Lines
The best signatures are concise: name, title, company, and one contact method. Every additional line reduces the chance recipients will read any of it.
Use Inline CSS Only
Email clients strip external stylesheets and most <style> tags. Use inline CSS for reliable rendering across Gmail, Outlook, Apple Mail, and mobile clients.
Optimize for Mobile
Over 60% of emails are read on mobile. Use a single-column layout, minimum 14px font size, and tap-friendly links (44x44px minimum touch target).
Don't Use Images for Text
Many email clients block images by default. If your name and title are in an image, recipients see a broken placeholder. Use HTML text for all essential information.
Include a CTA (But Just One)
One clear call-to-action ('Book a call', 'View portfolio', 'Download guide') drives more clicks than five competing links. Choose the one action that matters most.