HTML Email Signatures: Technical Guide
Create HTML signatures that work across all email clients.
Email clients have limited HTML support. You need to code carefully.
Why Tables
Outlook doesn't support modern CSS. Tables are the only reliable layout method.
Images
Host on public URL. Small files. Always alt text. Don't rely on images for key info.
Testing
Test in Gmail, Outlook, Apple Mail, and mobile apps.
Pro Tip
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