Flawless Cross-Platform Email Signature

I have a finished design for my email signature and need it converted into bullet-proof HTML that renders identically in:

• Outlook desktop
• Gmail on the web
• Outlook + Gmail mobile apps

The signature must include our company logo, a short block of contact information, and a row of social-media icons. Spacing, line-height, and alignment have to be pixel-perfect—no unexpected gaps or font shifts when the message is replied to or forwarded.

Here’s what I expect:

1. Table-based, inline-CSS HTML coded specifically for email clients, with fall-back fonts and alt text.
2. Retina-ready images compressed for fast load (I’ll supply the assets).
3. Clickable links for phone, email, website, and each social icon.
4. Thorough testing in the latest Outlook (Win/Mac), Gmail, and both iOS and Android apps.
5. A final ZIP containing the HTML file, images, and a quick install guide for Outlook and Gmail.
6. Screenshot proofs from your testing platform (Litmus, Email on Acid, or similar) before sign-off.

If you’ve built signatures that survive Outlook’s quirks and Gmail’s stripping rules, I’d love to see an example.