Can I build an address book of all my emails

[robin]

I have received thousands of emails from clients of mine and I would like to
build a mailing list to them can I import their email addresses into a
contacts folder.

 

[Diane Poremsky {MVP}]

There are a number of tools you can use (or VBA) that will walk though
messages and create contacts from existing email addresses.
http://www.slipstick.com/addins/contacts_entry.asp

 

[Russ Valentine [MVP-Outlook]]

You need to look for third party software that can do this. Outlook has no
such function.
Start here:
http://www.slipstick.com/addins/contacts_entry.asp