><i>However, Gmail will truncate emails that are more than 102KB</i><p>Could not reproduce this. Just tested with a 174102 character email, and the email went through fine.<p>Here's a repository with a file containing 120001 characters. Explanation of the science behind that number in the commit log.<p><a href="https://github.com/jhadjar/gmail-size-limit" rel="nofollow">https://github.com/jhadjar/gmail-size-limit</a>