The best email signatures in 2026 are short, mobile-friendly, and built with table-based HTML and inline CSS — because Gmail and Outlook strip external stylesheets. Fancy designs break; simple, structured signatures convert.
1. Keep it under six lines of text
Recipients scan signatures in under two seconds. Include:
- Name and title
- Company
- One phone number
- One link (website or booking page)
Remove fax numbers, multiple offices, and inspirational quotes unless your industry expects them.
2. Use web-safe fonts only
Stick to Arial, Helvetica, Georgia, Verdana, or Times New Roman. Outlook replaces unknown fonts with Times New Roman. SigCraft templates use web-safe stacks by default.
3. Image size guidelines
| Asset | Recommended size | Max file size |
|---|---|---|
| Avatar / headshot | 120×120 px (display at 80×80) | 50 KB |
| Company logo | 150×50 px max height | 40 KB |
| Promotional banner | 600×100 px (max width 600) | 80 KB |
| Social icons | 16×16 or 24×24 px | 5 KB each |
Always set explicit width and height attributes on images. Use PNG for photos and logos; never SVG in email (Outlook ignores SVG).
4. Build with tables, not divs
Email clients are not browsers. Use nested <table> layouts with style="" on every cell. Flexbox, Grid, and <style> blocks fail in Gmail and many Outlook versions.
SigCraft compiles signatures this way automatically — you don't need to write HTML by hand.
5. One primary call-to-action
Every extra link competes for attention. Pick one:
- Company website
- Calendar booking link
- LinkedIn profile
- Current campaign landing page
Add a banner only if you're actively running a promotion.
6. Test in Gmail and Outlook before rolling out
Send test emails to yourself on:
- Gmail web
- Outlook desktop (Windows uses Word's HTML engine)
- iPhone Apple Mail
Check: images load, links work, line breaks look correct, no horizontal scrolling on mobile.
7. Legal disclaimers — when you need them
Regulated industries (finance, legal, healthcare) often require confidentiality notices. Keep disclaimers to 2–3 lines. Place below the signature block in smaller gray text.
Do not copy a 500-word disclaimer from a 2005 template — it annoys mobile readers.
8. Accessibility basics
- Use alt text on avatar and logo images
- Ensure link text is descriptive ("Book a demo" not "click here")
- Maintain sufficient color contrast (4.5:1 for text)
- Don't rely on color alone to convey meaning
9. What to avoid
- Animated GIFs — distracting and often blocked
- Multiple phone numbers — pick one
- VCF attachments — use a vCard link instead if needed
- Huge images — slow load, trigger spam filters
- Custom fonts via @import — stripped everywhere
- Embedding video — doesn't work in email
10. Update quarterly
Refresh your signature when you change roles, rebrand, or run a new campaign. Add a "Last updated" note on internal templates so teams stay in sync.
Create a compliant signature now
SigCraft applies these best practices automatically: table layout, inline styles, web-safe fonts, optimized image slots, and one-click HTML copy for Gmail and Outlook.