Although it works fine, it does not synchronize properly across devices.

In other words, when I read and delete emails one one Mac, when I load Outlook 365 on another machine, the same emails still show unread.

I will try settings in the post you referred to i.e.

Mark messages as deleted and Do not automatically delete messages and see if that helps.

The key question remains, how come GoDaddy IMAP and GMail IMAP work properly with Outlook 365 and Cox IMAP does not.

Could it be that Cox has IMAP implemented differently than GoDaddy and GMail.

Please note that there are still more steps to complete Step 10: Highlight your Sparklight email address in the Internet Accounts window and select Properties.

Both services will be back up beginning at 7 a.m.

July 25. Thank you for your patience and we apologize for any inconvenience.

Select the Info category just below the file menu, and to the right, click the Add Account shown with a green plus symbol.

In this tab, check the box that says My outgoing server (SMTP) requires authentication and select the option Use same settings as my incoming mail server.

The port number above will automatically change to the correct number, 993.

Step 2: At the top of Outlook 2007 select the Tools menu; then select Account Settings Step 3: The Account Settings window will appear.

Step 5: The Auto Account Setup window will appear; check the Manually configure server settings or additional server types box at the bottom left corner of the window and click the Next button in the lower right corner.

Step 6: The Choose E-mail Service window will appear; select Internet E-mail option then click the Next button in the bottom right corner.

Step 7: The Internet E-mail Settings window will appear; enter the following information: User Information.

In this tab, check the Outgoing server requires authentication box and keep the Use same settings as my incoming mail server option selected.

Step 9: Select Advanced tab at the top of the Internet E-mail Settings window.

Under Incoming server (IMAP) the section that reads Use the following type of encrypted connection, select SSL from the drop-down menu.

Under Outgoing server (SMTP) the section that reads Use the following type of encrypted connection, select (SSL) or (TLS) from the drop-down menu.

Step 10: Enter the following information for the port numbers.

Once completed press the OK button in the lower right corner.

Step 11: The Internet E-mail Settings window will appear; click the Next button in the lower right corner.

Step 12: The Congratulations window will appear; click the Finish button in the bottom right corner.

Thats it You have successfully completed the Outlook 2007 setup.

In this tab, check the box for Outgoing server requires authentication and the circle for Use same settings as my incoming mail server.

Step 8: Click the Advanced tab and make the following changes under Server Port Numbers.

Thats it Your Sparklight email should now be working in Outlook 2003.

Step 4: Enter the name you want to display on outgoing email in the Display name box and click Next.

Step 5: Enter your full Sparklight email address in the E-mail address box and click Next.

Cox Mail Settings For Outlook Mac