1. Keep It Short
Long signatures overwhelm recipients and hurt mobile readability. Limit to 4–6 lines: name, title, company, phone, email, and one optional link. Anything more gets ignored or looks unprofessional.
2. Use Visual Hierarchy
Make the name prominent (larger, bold). Title and company in a smaller font. Use consistent spacing and alignment. Recipients should instantly know who sent the email.
3. One Clear CTA
If you add a call-to-action (e.g., "Book a demo," "Download our guide"), use exactly one. Multiple CTAs dilute focus and reduce click-through. Link to a single, high-value destination.
4. Avoid Image Overload
Logos and social icons are fine—but keep total image size under 50KB. Large images trigger spam filters, slow loading, and break in clients that block images by default.
5. Test Across Clients
Outlook, Gmail, Apple Mail, and mobile clients render HTML differently. Always preview your signature in multiple clients before rolling out.
6. Use Alt Text
Every image needs descriptive alt text. Screen readers and image-blocking clients rely on it. "Company logo" or "LinkedIn profile" are good examples.
7. Update Regularly
Stale signatures (old titles, wrong phone numbers, broken links) damage credibility. Centralized management ensures everyone's signature stays current automatically.