!--a11y-->
Settings for Sending Using the SMTP
Plug-In 
If you use the SMTP plug-in, you have to make the following settings only: (Read the corresponding guide to see the settings that are required for configuring your SAP system to communicate using SMTP.)
Creating Services for the SMTP Plug-In
The settings are not required for sending using external communication systems.

Note that you can only send messages using the SMTP plug-in if you have created a default domain in SAPconnect.