Similar to SendGrid extension and others, a request came in via enwiki to have an extension using the SparkPost API with similar functionality.
See request here: https://meta.wikimedia.org/wiki/User_talk:X-Savitar#Would_you_pleased_to_write_a_sparkpost_email_extension_for_Mediawiki?
In order to execute this request, the following would be necessary;
[X] Do we need just an extension for email delivery like SendGrid for example? yes, per task description.
[X] Request creation of a Gerrit repo for the project
[ ] Check request whether repo is created (this can take a few days)
[ ] Build the extension (Extension:SparkPost)
[ ] Create an extension page on MediaWiki org documenting this extension.
[ ] Do a release of the extension to be deployed.
[ ] Maintain this extension over time.