how do I delete a contact on my email

If the addresses are saved as contacts, delete them from the People area in Outlook:

• New Outlook or Outlook on the web / Outlook.com
  1. Select People on the side or left pane.
  2. Select the contact to remove.
  3. Select Delete from the ribbon, or right-click the contact and select Delete.
  4. Select Delete again to confirm.
• Classic Outlook for Windows
  1. Select People on the navigation bar.
  2. Select the contact.
  3. Select Delete on the ribbon, or right-click the contact and select Delete.

Important:

• Only contacts stored in personal contacts folders can be deleted.
• Contacts from the Global Address List cannot be edited or deleted there; those require administrator assistance.

If the entries are part of a contact list rather than individual contacts, deleting the contact list does not delete the contacts themselves.

References:

• Delete a contact in Outlook for Windows | Microsoft Support
• Add, find, edit, or delete a contact in Outlook | Microsoft Support
• Create, edit, or delete a contact list or contact group in Outlook | Microsoft Support