First off, you’ll need to register for an account. You won’t need your creditcard until the 14-day trial ends. After you’ve signed up, and activated your account, go to the control panel.
For configuration for specific smtp services, check the following guides:
If you have any other SMTP e-mail server, please use the following guide:
SMTPRelay acts as a relay between your salesforce org and a third party mailserver. Salesforce allows you to use set a mailserver as the relaying mailserver, but this method does not support authentication.
SMTPRelay trusts the IP range of salesforce only. When it receives an email message from salesforce it checks to see with which mailserver it should be sent. The server then uses that mailserver with credentials and SSL/TLS to relay the message.
What does SMTPRelay do?
SMTPRelay allows you to use any SMTP server from your Salesforce org. Salesforce does not support authenticated smtp relay servers. To make this work, you would have to have an open relay for the IP-ranges of Salesforce. This is not always a possibility.
The most common reason are to improve email deliverability and control. Sometimes emails sent by Salesforce end up in the junkmail folder, and there’s nothing you can do about it. You might want all email to go through a third party email server, which can add open-tracking.
SMTPRelay trusts the Salesforce mail-servers, and send the emails using the email server you provide. This can be anything, e.g. your own smtp server, Sendgrid, Mailgun, AuthSMTP or Amazon SES. These email services have excellent deliverability and a great support team. Read more information about the technical details.