Count of the number of self-hosted SMTP configurations by package
Problem
As a Product Manager, I need insight into how reliable sending an email from a self-hosted instance will be. Currently the default for a self-hosted instance is the use a rails SMTP relay. Using an SMTP relay without adhering to specific rules for ISPs accepting emails is notoriously unreliable. The statistic used in the industry is that at least 20% of emails sent this way are sent to spam.
Goal
We need a count of self-hosted instances that have transactional email apis configured by package. The different configuration options are listed here https://docs.gitlab.com/omnibus/settings/smtp.html