How to Add a Clickable Logo to Your Apple Mail Signature (Without Broken Attachments)
A logo that clicks through to your website is table stakes for a business signature. Done wrong in Apple Mail (dragged in as a file), it arrives as an attachment or a broken box. Done right, it's four ingredients.
Step by step
Don't drag the logo into the signature box
Dragging a file in makes it an attachment — recipients get paperclips, broken boxes on reply, or the logo as a downloadable file. This is the single most common mistake.
Host the logo online
The image must live at a public, permanent https:// URL. Any reliable host works; it must load in a private browser window with no login.
Size it exactly
Decide the display width (100–200px is typical for a logo). For crisp Retina rendering, host the image at 2× that size and set the display size in the HTML. Keep the file under ~50KB.
Wrap it in a link
The HTML pattern: <a href="https://yoursite.com"><img src="https://…/logo.png" width="160" height="48" alt="Acme Inc."></a> — explicit width/height (so phones don't blow it up) and alt text (for images-off readers).
Install it into Apple Mail
Paste-into-settings mangles HTML, so use the manual .mailsignature method — or skip it: Autograph has a logo slot with a link field, does the hosting and sizing, and installs in one click.
Test the click and the render
Send a test to Gmail: logo visible, correct size, and clicking it opens your site. Reply to the test too — the reply path is where attachments break.
Logo, link, done
Autograph's logo slot crops it, hosts it, sizes it for Retina, wraps it in your link, and installs the signature into Apple Mail in one click.
Download Autograph free See the templatesCommon questions
Can the logo link to something other than my website?
Yes — any URL works, including mailto: and tel: links, or a booking page. One link per image.
Why does my logo arrive as an attachment for recipients?
It was embedded as a file instead of referenced from the web. Rebuild with a hosted https image — that's the whole fix.
What's the best format for a signature logo?
PNG with transparency for logos, exact display dimensions set in the HTML, hosted at a permanent URL. Skip WebP/AVIF — email client support is inconsistent.