Short answer:
Email signature design is not like web design. To ensure your signature works across all email clients, you need to follow specific limitations and best practices.
Our design team is often asked to help with challenges like:
I’ve created our company email signature, but it doesn’t preview correctly on my iPhone.
We want a signature that looks great in all inboxes—desktop, web, and mobile.
If this sounds familiar, you’re not alone.
- Designers know what looks good
- But email signatures must also work across many email clients
Why email signature design is different
Email clients (Outlook, Gmail, mobile apps, etc.) do not follow the same standards as modern web browsers.
This means:
- A design that looks perfect in one inbox may break in another
- Consistency across all devices is not fully achievable
Important
Do not expect email signatures to render perfectly across all platforms. Instead, aim for a design that works reliably everywhere.
Design for mobile first
Most emails are opened on mobile devices. Your signature should be optimized for small screens.
- Use a maximum width of 320px
Tip: Create a single-column table with a width of 320px to guide your design.
Use Xink to ensure compatibility
Uploading your signature to Xink helps ensure it works consistently across users and devices.
- Upload your existing signature
- Or use the built-in designer in Xink
Use inline CSS only
Email clients do not support modern CSS in the same way as websites.
- Avoid external stylesheets
- Use inline CSS for all formatting (fonts, colors, spacing)
This ensures better compatibility, especially with Outlook.
Use the right image format
- Use JPG for best compatibility
- Use PNG when transparency is required
Some email clients may reduce image quality depending on format and handling.
Attachments cannot always be avoided
Including images (like logos) may sometimes result in attachments.
This is a limitation of email clients and cannot be fully prevented.
Place important content at the top
The top of your email is the most visible area, especially in preview panes.
- Avoid placing large images or logos at the very top
- Start with meaningful content (name, role, contact info)
- Place logos and banners below
Summary
- Design for compatibility, not perfection
- Optimize for mobile (320px width)
- Use inline CSS
- Expect differences across email clients
