Why Email Templates Must Stay Under 102KB

May 16, 2025

Emails exceeding 102KB may be clipped by Gmail and Outlook, breaking tracking pixels, risking CAN-SPAM compliance, and harming deliverability.

Why Email Templates Must Stay Under 102KB

A reminder for those running their email marketing internally.

Avoid sending email templates that are over 102KB in size.

Popular email providers like Outlook and Gmail will cut off part of your content with a "message clipped" footer if you do. This could prevent you from tracking who opens your emails, especially if your email tracking pixel is placed towards the end of the template, and may make your emails fall afoul of CAN-SPAM regulations.

This could result in penalties, fines, and damage to your reputation.

Therefore, to enhance the chances of your emails successfully reaching their destination, strive to keep your email bodies short.

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