If they're not in your Contacts, where are you seeing the email addresses?
Which operating system are you using?
Which email client are you using? Outlook Express? MS Outlook? Webmail of some type? Something else?
What are you doing now to remove the addresses and why isn't it working?
Hope this helps and let us know more.
Can anyone HELP! .......how do you remove email addresses from your computer that have come in via an email contact but are not in the address book? They are impossible to remove and create no end of problems when someone changes their email contact.