Many clients have the ability to remember what addresses you have sent messages to - this is known as your auto-complete list or cached contact list. Sometimes you may enter the wrong address for a recipient or the recipient changes their address or an address that no longer exists. The steps below will guide you through the process of either removing an address from this list or clearing the entire list.
Note: If you are experiencing an error indicating that no match is found or that the message cannot be sent because one of the addresses is invalid, clearing your Auto-Complete list could solve the issue.
Outlook for Mac
Removing an address from your auto-complete list
1) Open Outlook.
2) Click the New Email button.
3) In the new e-mail window, start typing the address you want to remove in the To: field. When it appears, click the X button next to the address.
Note: If you do not have the ability to delete an entry, then either the address is coming from the directory or your personal contacts. You cannot delete the entries from the directory but you can delete/update entries within your personal contacts (e.g. People).
Outlook for Windows
Removing an address from your auto-complete list
1) Open Outlook.
2) Click the Mail tab on the bottom of the screen so you are viewing your mailbox.
3) Click New Email.
4) In the new e-mail window, start typing the address you want to remove in the To: field. When it appears, click the X button next to the address.
Note: If you do not have the ability to delete an entry, then either the address is coming from the directory or your personal contacts. You cannot delete the entries from the directory but you can delete/update entries within your personal contacts (e.g. People).