To configure sending of POP3 and IMAP4 mail from GroupWise:
In an item you want to send, click Actions > Send Using, and then click the account from which you want to send.
or
Click , and then click the account.
The From name associated with that account will be in the From field of this item.
(Optional) To set the default account from which items are sent, click Accounts > Account Options, click an account, and then click Set Default.