Size limit for sending emails
Mailbox Sending Limit
There is a limit of 30MB for attachments for emails sent to your mailbox, should attachments larger than this be sent to your mailbox the sender will get a bounceback with a message similar to the following: message size (size) exceeds size limit 31457280 of server mail.(yourdomain)
Popular Options
If you need to send a large file we would recommend using one of the following services