If your POP or IMAP mail server requires SMTP authentication when Microsoft Entourage 2008 for Mac users send messages, you can provide special login information to users for that purpose. Different account IDs and passwords can be specified for sending and receiving messages.
Enable SMTP authentication in Entourage
On the Tools menu, click Accounts.
On the Mail tab, double-click the IMAP account or the POP account.
On the Account Settings tab, click Click here for advanced sending options, and then select the SMTP server requires authentication check box.
If different account ID and password information is required, click Log on using, and then enter the information.
