This is the correct answer. And it is highly unlikely that we (the Atlassian Connect) team will allow this in the future. My own add-on (My Reminders) uses Mailgun to send emails to great success. They have an excellent free plan. I can also recommend Amazon SES.
As a Jira power user, I was at first doubtful that Trello could benefit my workflow. Jira already uses boards (ones you can customize!), so why would I even need to use Trello?! In this post you will...
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