Default max file size limit that can be sent and received in cPanel (Exim Mail Server) is 50 MB, and How to Limit Maximum Email<\/strong> Size or Email Attachment ?<\/p>\n\n\n\n To Limit Maximum Email Size<\/strong> do the following,<\/p>\n\n\n\n Default max file size limit that can be sent and received in cPanel (Exim Mail Server) is 50 MB, and How to Limit Maximum Email Size or Email Attachment ? To Limit Maximum Email Size do the following, Login to cPanel\/WHM as root Under Service Configuration, Click \u201cexim Configuration Manager\u201d Click \u201cAdvanced Editor\u201d Scroll down and Click \u201cAdd additional Configuration<\/p>\n