Outlook 2007
- From the Tools menu, select "Account Settings."
- Select your Email account and click the "Change" button.
- Click the "More Settings" button in the bottom-right corner of the E-Mail Accounts window.
- In the Internet Email Settings window, click the "Outgoing Server" tab.
- Check that the box next to "My outgoing server (SMTP) requires authentication" is checked and "use same settings as my incoming mail server" is selected.
Outlook 2010/2013/2016
- From the File menu, select "Info" and choose "Account Settings."
- Select your Email account and click the "Change" button.
- Click the "More Settings..." button in the bottom-right corner of the E-Mail Accounts window.
- In the Internet Email Settings window, click the "Outgoing Server" tab.
- Check that the box next to "My outgoing server (SMTP) requires authentication" is checked and "use same settings as my incoming mail server" is selected.
Mac Mail for OS X
- Open Mac Mail.
- From the "Mail" menu, choose "Preferences."
- Click the "Accounts" icon at the top of the window.
- Next to "Outgoing Mail Server (SMTP):" click on the drop-down menu and go to "Edit SMTP Server List"
- Check to make sure you have the correct SMTP server selected at the top.
- Verify that "Authentication" is set to "Password."
- If the "User Name" and "Password" fields are not set, enter your full email address as the username, and your password.
- Click "Ok."
- Close the accounts window by clicking on the red circle in the far upper left hand corner of the "Accounts" window.
- Mac Mail will ask you if you wish to save your changes, make sure to click the "Save" button.