Hello JohnnyD37,   I took a look at the emails in your account that you were testing and I see the problem you are running into. From what I can see you are wanting to use a custom URL that pulls in the contacts email address when they receive the email. You will need to use an XHTML format to accomplish any use of custom content and right now the email is in HTML.   With the way you have this setup the link will not work. This is because you are including the dynamic field within the link HTML and it won't render the link properly. This is due to the fact that we run the code through an XHTML validator before we parse in the information and having two opening brackets will make it fail.   The way to ensure this works correctly is to actually create a custom URL for each contact and upload all the HTML that is required for the link into the custom fields for the contacts. You would then simply reference those custom fields in the code.   For Example if I have the URL "Http://www.test.com/1111" and the "1111" is the dynamic content I would need to add "<a href="http://www.test.com/1111">Click here</a>" into the Contact Custom Fields. Each one of the Custom fields has a character limit of 50 characters so you do want to break the content up with that in mind.   For this example I would probably set it up as follows in the custom fields: Custom Field 1: <a href="http://www.test.com/ Custom Field 2: 1111 Custom Field 3: ">Click here</a> Note: To upload this successfully into Constant Contact you would have to create a spread sheet with all the columns labeled exactly as they are in our system so you can bypass the screen asking you to select a label.   Once this information is associated with the contact you would set it up in your code as follows: <Property name="Subscriber.CustomText1"/><Property name="Subscriber.CustomText2"/><Property name="Subscriber.CustomText3"/>   You will not be able to see that this link is working until you test it as a live send but setting up the link this way should correct the issue you are running into.   Please let me know if you have any other questions about this and we will be happy to assist you.   Sincerely, Erin B. API Support ... View more