The options for your Purdue email are
The Purdue email service options determine where your @purdue.edu email is delivered.
Modifying your Email service
Use the Purdue Exchange Server
This option is only for Faculty and Staff. This means that any email sent to your @purdue.edu address will be stored on the Purdue Exchange server. You can use Microsoft Outlook or Outlook Web Access (OWA) to access your email and calendar information. To avoid potential loss of email, please see the Caution below.
Use the Purdue Office 365 email Service
This option is only for Students and Retirees. This means that any email sent to your @purdue.edu address will be a part of the Purdue space in the Microsoft cloud solution for email. You can use the Microsoft portal (https://portal.office.com) or any other configured email client (using standard IMAP or POP protocols) to access your email and calendar information. To avoid potential loss of email, please see the Caution below.
NOTE: You must activate or coordinate your Office 365 account before you may begin receiving email to that address. Please follow the steps in How do I activate or coordinate my Purdue Office 365 account?
Forward your @purdue.edu email (to an address you specify)
This means that you would like to have all of your Purdue email sent to an alternate account. Please make sure to use a valid email address. To avoid potential loss of email, please see the Caution below.
Disable your @purdue.edu email (your_login@purdue.edu will not receive email)
This means that you do not want to receive any Purdue email. Email sent to your @purdue.edu address will be returned to the sender (bounced), stating user unknown. This choice should only be used once you have left Purdue, as your Purdue email address is used for official university business. To avoid potential loss of email, please see the Caution below.
Tip: This is typically referred to as setting your email service to reject.
Caution: If you currently use either the Purdue Exchange Service or the Purdue Office 365 Email Service and you change your email settings, an account deletion process will be initiated.