We are uploading html_content via the create/update endpoints for campaigns POST /emails and PUT /emails/activities/{campaign_activity_id} We have links within our html that use custom fields as params. ex. <a href="https://mywebsite.com?custom_param=[[custom.custom_attr]]">Cool Link</a> Our problem is the brackets in anchor tags are being url encoded. ex. `<a href="https://mywebsite.com?custom_param=%5B%5Bcustom.custom_attr%5D%5D">Cool Link</a>` So, when the email is sent the value isn't replaced.
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