knowledge base

Details:

In some instances, users can connect to the server by SMTP but not send mail. 
When they send mail, the connection is refused, or it appears to go through, but 
they get a bounced error e-mail from the server that says "Sorry. This host is not in 
my rcpt hosts file." The reason they get this message is because there is a 
security feature on the mail system that requires users to authenticate themselves 
to the server prior to sending mail. 

Here is the solution to this error in various e-mail clients: 

1. Change the user's e-mail client settings to automatically authenticate before 
sending mail. Here are instructions for allowing authentication in various e-mail 
programs:

Microsoft Outlook Express on Windows

1. Launch Outlook Express.
2. Under "Tools" select "Accounts..."
3. Select your account name and click "Properties" to edit your account.
4. Click the "Servers" tab.
5. Check the "My Server Requires Authentication" check box and the 
adjacent "settings" button.
6. Make sure the "Use same settings as my Incoming Mail Server" radio button is 
selected.
7. Click "OK" buttons twice, and the "close" button. You are finished.

Microsoft Outlook 2002 / 2003 / 2007 on Windows

1. Launch Outlook.
2. Select Tools > E-mail Accounts...
3. Select "View or change email accounts"
4. Click "More settings".
5. Select the "Outgoing Server" tab.
6. Check the "My outgoing server (SMTP) requires authentication" box. - Make sure 
the "Use same settings as my Incoming Mail Server" radio button is selected.
7. Click "OK" button. Click "Next". Click "Finish". You are finished.

Microsoft Outlook 2000 on Windows

1. Launch Outlook.
2. Under "Tools" select "services..."
3. Select "Internet Mail - (your account name)" and click "Properties" to edit your 
account.
4. Click the "Servers" tab.
5. Check the "My Server Requires Authentication" check box and the 
adjacent "settings" button.
6. Make sure the "Use same settings as my Incoming Mail Server" radio button is 
selected.
7. Click "OK" buttons 3 times to close and save all the windows. You are finished.

Microsoft Outlook Express on Macintosh

1. Launch Outlook Express.
2. Under "Tools" select "Accounts..."
3. Select your account name and click "Edit" to edit your account.
4. Under the "Sending Mail" section, Click the "Click here for advanced sending 
options" field.
5. Check the "SMTP Server Requires Authentication" check box.
6. Make sure the "Use same settings as Incoming Mail Server" radio button is 
selected.
7. Close window. Click "OK". Close window. You are finished.

MacOS10.1 

1.On the menu bar of the Mac mail application, click the Mail option and 
select "Preferences." 
2.Highlight the account and click the "Edit" button. 
3.Check the box labelled "Use authentication when sending mail." 
4.In the "SMTP User" field enter: smtp.YourHostedDomainName.com 
5.In the "SMTP Password" field enter: Your POP account password 
6.Click "OK." 

MacOS10.2 Mail 

1.On the menu bar of the Mac mail application, click the Mail option and 
select "Preferences." 
2.Highlight the account and click the "Edit" button. 
3.Click the "Options" button at the bottom of the page. 
4.Click the "Authentication None" box. 
5.Select "Password" from the dropdown list. 
6.In the "Username" field enter: smtp.YourHostedDomainName.com 
7.In the "Password" field enter: Your POP account password 
8.Click "OK." 

MacOS10.3 Mail

1.On the menu bar of the Mac mail application, click the Mail option and 
select "Preferences." 
2.Click the Accounts icon. 
3.Select your account from the menu on the left. 
4.At the bottom of the right window, click the "Server Settings" button. 
5.Click the "Authentication None" box. 
6.Select "Password" from the dropdown list. 
7.In the "Username" field enter your email address (e.g., 
you@YourHostedDomainName.com) 
8.In the "Password" field enter: Your POP account password 
9.Click "OK."  

Mac OS X 10.5 Mail

1. Open Mail from the Dock or the Applications folder..
2. From the Mail menu, select Preferences.
3. Click Accounts.
Result: The Account Information window displays.
4. Select the Cox.net account, then from the Outgoing Mail Server (SMTP) drop-
down list, select Edit SMTP Server List.
5. Click the Advanced tab, then from the Authentication drop-down list, select 
Password.
6. Enter the mailbox User Name and Password, then click the OK button.
7. Close the Accounts window, then click the Save button when prompted to save 
the changes.