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Knowledge Base:  Hosting - E-mail Management:  Cannot Connect to SMTP Server to Send Mail

When trying to send mail through the SMTP server, an error message is 
generated in the e-mail client indicating that the server cannot be found or the 
server terminated the connection.

Certain ISPs (noteably SBC and Earthlink) block outgoing mail that is not sent 
through their servers. If a user cannot connect to the server by SMTP, this is 
usually the case. The only workaround is to enter the ISPs SMTP server address. 
(e.g. See demo for an example of how this is done in Outlook 
Express. This procedure should work very similarly for any email software, though 
the terminology may be a bit different.

Alternately, the sender's IP address might be listed in the black list. 
IP addresses that are in the blacklist cannot send mail through the 
InfoServe Media server. IP addresses are generally removed automatically from 
the blacklist within 24 hours, and mail can be sent through the 
server after that time. To check to see if a given IP address is listed in, search on the IP address at Users can 
determine their IP address by visiting

Entourage SMTP Authentication
  1. From the Tools menu, select Accounts.
  2. Click once on the name of the account you wish to edit. This will highlight the account.
  3. Click on the Edit button at the top of the Accounts window. DO NOT click on the edit menu at the very top of the screen.
  4. In the Account Settings tab at the bottom of the Edit Account window, change the text to in the SMTP server box.
  5. Click on the Click here for advanced sending options button underneath the SMTP server box.
  6. Place a checkmark in the box next to SMTP server requires authentication.
  7. Click on the very small close box in the upper-left corner of this settings window to close it.
  8. Click the OK button to close the Edit Account window, and then close the Accounts window.
SMTP authentication has been enabled.
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