The maximum size of attachment that you are currently able to send via our web hosting account is 10MB. 10MB is the email attachment standard across many web hosting and internet service providers and anything higher is generally rejected. Please note, that depending on the encoding used, the file size will alter. For example, a 10MB file on your computer can become 12MB after encoding, so we strongly suggest keeping it less than 10MB if possible when email.
We suggest if you are interested in sending larger files, then you will need to do so by using FTP or providing the receiver a download like from where they can download the web hosting content.
If you are unsure or need additional assistance, please feel free to get in contact with your cPanel web hosting support team for further assistance or clarifications.