Issues with testing Marketo links
If you are using Litmus with Marketo, you may see working links reported as failed in the Links section of your email's Previews & QA tab.
This is due to Marketo handling link redirects via Javascript. When Litmus checks your links in your Previews & QA checklist, the tool makes a web request without a web browser to each URL and checks to see if it is returning a success message. This is done programmatically through a tool similar to curl, and the tool does not follow JavaScript redirects.
Because of this, any link redirects being handled via Javascript will be reported as a failure even though we can successfully follow the link and load the page under normal circumstances.