Clean your HTML-code from ActiveX, JavaScript, Flash, …

It’s best to keep your message and HTML-code as clean and simple as possible. Just about every single email application out there blocks JavaScript, ActiveX, Flash etc. They all block it to prevent viruses, as a security measure.

Make sure your code doesn’t contain any ActiveX. Double-check form submit buttons, pop-up window links, image pre-loaders, etc. and make sure they’re clean.

Avoid Flash. Embedded Flash doesn’t work consistently in most email clients. Your newsletter doesn’t need Flash, to be relevant and have a great impact.

Avoid JavaScript. JavaScript is disabled in most clients as a security precaution. Instead of risking your audience seeing a JavaScript warning when trying to read your message, best leave it out.

Use absolute, not relative, links. Relative links open the risk of all links and images being broken in an email because the mail client won’t know where to find them.


  1. Posted July 5, 2009 at 8:28 am | Permalink

    I’m using mailchimp but am an html virgin pretty much. Any clues on how I can locate offending ActiveX code in my html?

    • Posted July 7, 2009 at 11:35 am | Permalink

      Open your source code and do a find.
      Script, SWF and activex word hit should be avoided.

Post a Comment

Required fields are marked *

%d bloggers like this: