Mail: why do deleted e-mail addresses stay in the memory!!

I use Mail to send and receive e-mails. When I delete an old e-mail address and replace it with a new one (for the same person) Mail still remembers the old address as well as offering me the new one when I start to type the first letters in the "To" box. Is there a way I can ‘permanently’ delete old e-mail addresses please. Otherwise I have to "remember" which is the old one and which is new and as I have many e-mail addresses in my list, that's very difficult.

I hope someone can help. Thanks.

1. On the Menu bar go to Window - Previous Recipients

or

2. Start typing the address or name you want to remove in a new message and select it from the auto-complete list.
Click the small down arrow that appears when you hover the cursor over the recipient's name.
Select 'Remove Address' from the menu.

Thank you!!

That's brilliant!!!

It worked!!!

THANK YOU SO MUCH, that's been annoying me for the last 8 weeks.

Thank you, Thank you!!

Warmest regards.

Thanks for option 2 Bob. I didn't know about that method. Actually I forgot about that one. Yeah that's it, forgot.