Alternate Outgoing SMTP Configuration
INTRODUCTIONThis article demonstrates how to configure Microsoft Outlook 2007 to use the alternate outgoing SMTP port.
MORE INFORMATION
You may also use these steps to configure other versions of Outlook and Entourage as the user interface might look slightly different, the settings will be exactly the same.
Overview of SMTP
Simple Mail Transfer Protocol (SMTP) is the protocol used to deliver E-mail through the internet. By default outgoing E-mail servers use the SMTP protocol on port 25. Due to all of the spam issues on the internet, Internet Service Providers (ISP) have defended their users from being victims of malicious spam attacks by restricting port 25 to only use their SMTP servers. As an example, if you use an AT&T DSL connection at your home or office you will not be able to use your own E-mail server outgoing address (mail.yourdomain.com) on port 25 because it will be rejected unless you use their outgoing address (smpt.att.yahoo.com). Many users will simply configure their E-mail clients to accept mail from their own domain but use their ISP outgoing server to send mail. In most cases this will work, however, you will find yourself getting rejected by recipients when sending E-mail in some cases and the reason is that the spam protection architectures on their end will perform reverse DNS look-ups (PTR) on the IP address that your mail was sent from. When the recipient's server performs a look-up on the IP of your outgoing server it must match the domain of your E-mail address otherwise it is rejected and marked as spam.
Microsoft Outlook 2007 Users
1. Open Outlook and click on the "Tools" drop down menu and click on "Account Settings".
2. Highlight the account you want to change by clicking on it once and then click on the "Change" button.
3. In the text field next to "Outgoing mail server (SMTP)" type in your outgoing server address which usually looks something like "mail.yourdomain.com" with your domain address filled in. This will usually also be the same address as your incoming server.
4. Click on the "More Settings" button.
5. Click on the "Outgoing Server" tab at the top of the window.
6. Check the box next to "My outgoing server (SMTP) requires authentication".
7. Check the radio button next to "Use the same settings as my incoming mail server"
8. Click on the "Advanced" tab on the top right of the window.
9. In the text field next to "Outgoing server (SMTP)" change the number to 587.
10. In the drop down menu next to "Use the following type of encryption protection" select None. Click "OK"
11. You may click the "Test Account Settings" to make sure everything is configured properly and once you are finished click "Next" and "Finish".
Microsoft Entourage 2008 for Mac
1. Open Entourage and click on the "Tools" drop down menu and click on "Accounts".
2. Double click on the account you want to apply the new port to.
3. In the text field next to "SMTP server" type in your outgoing server address which usually looks something like "mail.yourdomain.com" with your domain address filled in. This will usually also be the same address as your incoming server.
4. Click on the button that says "Click here for advanced sending options".
5. Make sure the box next to "SMTP service requires secure connection (SSL)" is not checked. Check the box next to "Override default SMTP port" and type 587 in the text field next to it.
6. Check the box next to "SMTP server requires authentication" and check the radio button that says "Use same settings as receiving mail server".
7. Once you are finished close the window and click the "OK" button.
Article Details
Last Updated
30th of November, 2008
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