You can keep information about individuals or groups that you correspond with in your Address Book. OE allows you to copy the address of the sender of the current message into your Address Book. With the message in the reading window, in the Tools menu, select Add to Address Book . To use your Address Book, you can either click on the Open Address Book icon on the toolbar or select the Address Book from among the folders in your Local inbox in the left panel. From there, to send an email to someone, simply highlight their information and click New .
Mailing lists appear as subfolders underneath Contacts in the left panel.
To create a mailing list, in the Address Book window, click New Group . Once you've created a Group, you can copy addresses into it by dragging and dropping them.