Email Signature Not Showing? Fix Images, Formatting & Display Issues

You spent 20 minutes crafting the perfect email signature. You paste it in. It looks great on your screen. Then you send a test email and everything falls apart. Images are missing, fonts changed, spacing went haywire. Here is how to diagnose and fix the five most common signature problems.

Problem 1: Images Not Loading

This is the single most reported issue. Your logo or headshot shows as a broken image icon or a blank space. There are three typical causes:

The image URL is broken

If you linked to an image on Google Drive, Dropbox, or a temporary hosting service, the URL may have expired or the sharing permissions may have changed. Open the image URL directly in your browser. If it does not load there, the URL is dead.

Fix: re-upload the image to a permanent hosting service. Use a CDN, your company website, or a tool like EmailSign that hosts signature images permanently.

Outlook is blocking images

Outlook blocks external images by default for security. Recipients see a placeholder until they click "Download pictures." You cannot control this from the sender side. What you can do:

Add alt text to every image so recipients see a text label instead of a blank box
Keep images under 50KB for faster loading when unblocked
Use HTTPS URLs. Some email clients block HTTP (non-secure) image sources entirely.

The image is embedded as a local file path

If your image source looks like file:///C:/Users/... or /Users/name/Desktop/..., it only works on your computer. No one else can see it. Host the image online and use the full HTTPS URL.

Problem 2: Formatting Lost When Pasting

You copy your signature from a design tool, paste it into your email client, and the layout is gone. Colors vanished, fonts changed, everything is left-aligned plain text.

The likely cause: you used Ctrl+Shift+V (paste without formatting) instead of Ctrl+V (paste with formatting). On Mac, it is Cmd+Shift+V vs. Cmd+V. The keyboard shortcut difference strips all HTML and CSS.

If Ctrl+V still does not preserve formatting, try this workaround:

Paste into a Google Doc first (Ctrl+V)
Select all in the Google Doc
Copy from the Google Doc
Paste into your email client

Google Docs sanitizes the HTML in a way that most email clients accept cleanly. It works for both Gmail and Outlook.

Problem 3: Signature Disappearing on Reply

Your signature appears on new emails but vanishes when you reply or forward. This is almost always a settings issue:

Gmail: Go to Settings > Signature. Check the "On reply/forward use" dropdown. If it says "No signature," change it to your signature name.
Outlook: Go to Signature settings. Under "Choose default signature," set both "New messages" and "Replies/forwards" to your signature.
Apple Mail: In Preferences > Signatures, make sure "Choose Signature" is set to your signature (not "None") for the relevant email account.

Some organizations use Microsoft 365 transport rules that strip signatures on replies to prevent them from stacking in long threads. Check with your IT admin if the setting looks correct but the problem persists.

Problem 4: Mobile Rendering Issues

Your signature looks perfect on desktop but breaks on phone screens. Text overflows, images are too large, or the layout collapses into an unreadable mess.

Common causes and fixes

Signature wider than 600px: Mobile email clients scale down wide content, but the results are unpredictable. Keep your signature under 600 pixels wide. See our size guide for exact dimensions.
Fixed-width tables: If your signature uses pixel-width tables, they will not adapt to narrow screens. Use percentage-based widths where possible or set a max-width of 600px.
Tiny tap targets: Social icons smaller than 20px are nearly impossible to tap on mobile. Use 24px minimum for touch-friendly icons.

Test your signature by sending an email to yourself and opening it on your phone. Check Gmail, Apple Mail, and Outlook mobile if possible. Each renders differently.

Problem 5: Broken Social Icons

Social media icons show as broken images, display at the wrong size, or link to the wrong profiles. Causes:

Icon images hosted on a dead URL: If you grabbed free icons from a random website, the URL may have changed. Re-host icons on your own domain or use a reliable CDN.
Mixed icon styles: Using a colored LinkedIn icon next to a monochrome Twitter icon looks unintentional. Pick one style (all colored, all monochrome, all outlined) and stick with it.
Wrong profile URLs: Copy the URL directly from your browser while on your profile page. Do not guess the URL format.

Still Stuck?

Most signature problems come from manual HTML editing and self-hosted images. EmailSign eliminates both by hosting your images, optimizing your HTML for all email clients, and giving you a one-click installation process. If something breaks, the support team can diagnose it from your account dashboard.