We always suggest using our EasyEditor to build your emails. It provides an easy and effective way to craft beautiful campaigns. If you're uploading HTML code created in third-party software, we're not able to guarantee it'll look exactly the same once uploaded to our EasyEditor.
If you do use a custom-coded template, you need some link placeholders to enable certain types of system link in your campaigns. Here are the most common ones:
What is it?
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Double opt-in link
Preference centre link