Click the Use customer email configuration checkbox.
Enter username.
Enter password.
Enter hostname.
Note: the SMTP server must support STARTTLS.
Use the default port 587.
Enter a From address.
(Optional) To use the defined server for your customer and platform emails,
check Use for all email.
Note: When Use for all email isnβt checked, only outgoing customer email uses the configured
server, such as email that you generate to send to your shoppers. All platform email continues to
use the default SMTP server that Salesforce provides.