Log in to Network Solutions administrative console at https://www.networksolutions.com/manage-it/index.jsp by entering your 'User ID', 'Password', selecting 'Manage All Services' from 'Log-in to' drop-down and clicking 'Login'.
Click 'Edit DNS' under 'DNS Settings'. (If this is the first time you are editing the DNS settings, then click 'Custom DNS Setting'). The 'Edit DNS' interface will appear.
Click 'Continue' in the 'DNS Manager-Advanced Tools'. The 'DNS Manager - Advanced Tools' interface will appear.
Click Add/Edit in the 'Mail Servers' panel. The 'Mail Servers' table will be displayed.
Delete the existing MX records.
Tip: If you do not want to delete the existing records at this moment, you can set them with lower priority. Edit the 'Mail Servers' table to set the priority with higher numbers like 10, 20 and so on for the existing records. You can delete these records at a later time after your changes have taken effect.
Update the 'Mail Servers' table with the information in the following table.
The MX records for your domain are updated now. But it may take up to 48 hours for the changes to take effect.