Mail Box Quota

Is there a set quota for email sent to my account? 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) Additionally, no email will be delivered that would make your mailbox exceed its quota, which by default is 400MB. However you can create as many mail boxes as you wish with your unlimited web hosting account. Mail boxes have to be limited in such a way. A forgotten mail box can not be left to increase in size unattended, hence the limit.