550 Mail Not Accepted From Blacklisted Ip Address

When you try to send email through an email client and outgoing mail server authentication is not on by default.

To fix Error 550, enable authentication in the e-mail client program: Microsoft Outlook Express on Windows:

• Under Tools select Accounts
• Select account name > Click Properties
• Click the Servers tab.
• Check My Server Requires Authentication check box and the adjacent settings button.
• Select the Use same settings as my Incoming Mail Server radio button
• Click OK > OK, and then close.

Microsoft Outlook 2002 on Windows:

• Go to Tools > E-mail Accounts
• Click View or change email accounts
• Click More settings
• Click Outgoing Server tab
• Click the My outgoing server (SMTP) requires authentication check box
• Click the radio button Make sure that the "Use same settings as my Incoming Mail Server
• Click OK > Next > Finish