There are several reasons to limit the use of external resources in your email campaigns:
Load Time: Emails with lots of external resources tend to load slower. Quick loading is crucial for email open rates and user engagement. Security: External resources can be a security risk, making emails susceptible to phishing attacks and other malicious activities. Reliability: If the external server is down, the resources won’t load, affecting the email's appearance and functionality. Privacy: Loading external resources can track user behavior, raising privacy concerns among recipients.