Using SparkPost with DirectMail
The following steps will walk you through using SparkPost with e3 Software's DirectMail for Mac.
First you need to enable SMTP Access - check out DirectMail's article here: http://directmailmac.com/support/article/232
Set up a new Mail Server profile and configure as below:
The password is a valid API key you have generated from your SparkPost account with the 'Send via SMTP' permission enabled.
Note that your From address much be from a domain that you have configured and verified on your SparkPost account (such as 'email@example.com', etc.).