Email Signature - This image is too large to display

Service Hub Tickets & Conversations
1

Hello,

When insert the HTML code for my HubSpot signature, I am including our company logo. The preview looks fine, howvever, when I actually email anyone, the email that is received the logo portion of my signature has a message that states “This Image is Too Large to Display”.

I’ve shrunk the image down to a small 100x90 px and updated the HTML in the signature generator and still receive this message even with a tiny image.

Has anyone been able to succusfully include a graphical logo or similar in their singature or have gone through this and know how to resolve?

Thank you,

David

2

Hi @Dave75! Are you using custom html or html from the HubSpot signature generator?

Have you tried replacing the file type? Maybe uploading some screenshots of the html will help provide valuable context.

3

Hi @Dave75 here’s what might be going wrong and how to fix it:

  1. Check actual file size (KB/MB), not just dimensions: Even if the image is 100x90 pixels, if it’s a high-resolution PNG or not optimized for web, the file size could still be large (e.g., over 1MB), which can trigger the “too large to display” message in some email clients. Try compressing the image with a tool like TinyPNG or exporting it as a lower-quality JPEG or optimized PNG.
  2. Host image externally with reliable URL: Avoid embedding the image directly with data&colon;image/… base64 encoding or hosting it on a slow or restrictive server. Instead, upload the image to HubSpot’s file manager or a fast-loading CDN and use the public link in your <img src=“”>.
  3. Use absolute URLs only: Make sure the image source (src) uses a full https://… path. Relative URLs or links requiring authentication can cause loading issues in email clients.
  4. Avoid large DPI settings: Sometimes even a small image dimension-wise may be tagged as “large” due to high DPI (e.g., 300dpi). Try exporting your image at 72dpi, which is standard for web/email.
  5. Email client limitations: Some clients (especially Outlook or mobile apps) have quirks with how they interpret image size and HTML. Try testing your email in multiple clients using a service like Litmus or Email on Acid.
    Hope it helps

RubenB_0-1744951380316.png

Ruben Burdin

Real-Time Data Sync Between any CRM or Database | Founder @Stacksync (YC W24)

4

I have a similar issue and it’s specific to Hubspot. I use my own HTML source code on emails. If I send the same HTML code through another email client there is no issue.

When I paste the HTML code into Hubspot it blows the image size up, specifically on Gmail but other email clients handle it fine.

It doesn’t make sense that if I test the same HTML code straight into Gmail from Outlook or Twillio or anywhere else, it is fine but when I paste that code and send it THROUGH Hubspot, it blows the photo size up.

The “preview” contact shows it all distorted and blown up on HS but when sent through anywhere else, it’s fine. Do you have any recommendations? I’m trying to update my source code to a new design and my deelopers are stuck right now.