MailBluster sets the maximum email content size at 120 KB. If your email exceeds this limit, you will see an error message.
To ensure smooth delivery and avoid issues, it’s recommended to keep email content between 15 KB and 100 KB.
For example, Gmail clips emails that exceed 102 KB, hiding extra content behind a “view entire message” link.
By following these guidelines, you ensure your entire email is visible to recipients, improving readability and engagement. Keeping content within the recommended size also helps maintain high deliverability rates across different email providers.