Keep in mind that embedding the full form HTML code in your Email Marketing campaigns is not recommended. It can cause unwelcome display and delivery issues. Instead, use the default signup form option instead. This will add a Signup button to the footer of all your mailings.
Email Marketing links to your default form wherever you use the macro [[subscribe]] in your email campaign. To add an extra clickable link in the campaign body, just copy the line below and paste it into any text module in your email:
The link will display like this:
Don't forget to send a test to yourself, to check your work. Feel free to edit the link display text used in the square brackets. It's the visible text your readers will see in the final email.