What are the guidelines for preparing the data file to bulk upload aliases for Cloudmail?

Guidelines for preparing the data file to bulk upload aliases for Cloudmail - 

Mode

This denotes the action to be taken on the corresponding record

Different alphabets are assigned to demonstrate different modes

A: This alphabet denotes a newly added record

M: This alphabet denotes modification in an already existing record

D: This alphabet is used to delete the alias     

'Alias Name' will be a dummy ID which should not be an existing user/group ID

 'Account' is the actual email ID of an existing user which will receive the forwarded email from the alias email ID

Sample file format to add aliases through bulk upload method: