Email Being used to initiate Process Model

Hi All,

Has anyone run with the issue of  using the Receive Message event in process model to initiate the process model: 

(trigger a particular process model through email using receive message event at start node of the process model. In this approach you will have to store all the required email properties using message properties bean.
To trigger the process model you need to send an email to processmodeluuid<model_uuid>@subdomain.appiancloud.com(if you are on cloud). If you don't want to provide an email id having processmodeluuid<model_uuid>@subdomain.appiancloud details to users then you need to make some alias configurations in custom.properties file & need to create a service account at MS exchange.
Your Appian administrator must enable the Anonymous system user to allow the sending of an email to a process or process model.)

By using this approach every time after the process is initiated the emails from the outlook mail box are automatically getting deleted, only the ones that were sent to appian with the process uuid. 

Has anyone had this issue before?

thanks in advance