Removing comments from the HTML code of your marketing emails is crucial for several reasons:
Deliverability: Email clients have varying levels of support for HTML comments, and some may even interpret them as part of the email content, leading to potential rendering issues. File Size: Comments add to the overall size of your email. Removing them can reduce the email size, which can improve loading times and deliverability. Security: Comments can sometimes include sensitive information or give insights into the email's code structure, which could be exploited if intercepted.