To avoid penalties that affect your email marketing, follow these best practices:
1. High-Quality Content: Ensure that the content on your landing pages is unique, valuable, and follows SEO best practices. 2. Clean Code: Avoid hidden text, links, or any form of cloaking. 3. Safe Links: Only include links to reputable sites that follow Google's Webmaster Guidelines. 4. Regular Audits: Regularly audit the websites you link to from your emails to ensure they are not violating any guidelines.