Hosted customers will be using SMTP. Check the user in Dimension is set up to use SMTP as follows:
Ribbon style menus:
Log in to Dimensions as a user with admin rights
Click on System
Within Security click on User Records
Choose the relevant user record that is getting the error
Click on Options
Click Edit
Change the email setting to SMTP
Click Save
Close the Options window and then click on the E-Mail icon
Enter the user's e-mail address in the E-mail field
Enter the user's name in the E-mail name field
Tick the Copy E-mail to box and enter the user's email address again (so they are sent a copy)
Select the server in the SMTP Server field (the SMTP User field should then be filled in by default)
Click Save
Classic/Module Menu style menus:
Log in to Dimensions as a user with admin rights
Select on System Control from the navigation bar
Select Users, User Records
Choose the relevant user record that is getting the error
Click on Options
Click Edit
Change the email setting to SMTP
Click Save
Close the Options window and then click on the E-Mail icon
Enter the user's e-mail address in the E-mail field
Enter the user's name in the E-mail name field
Tick the Copy E-mail to box and enter the user's email address again (so they are sent a copy)
Select the server in the SMTP Server field (the SMTP User field should then be filled in by default)
Click Save
The user will need to log out and back in to Dimensions to pick up the new setting and then should be able to send emails without the error.