We should offer 2 options:
projects email address
custom email address
I would love to be able to do this. Currently notifications are being sent out as the default Jira email address rather than the projects email address.
This has now been released in Cloud and Server version 1.4.3. See https://blog.codebarrel.io/set-e-mail-reply-to-and-from-addresses-a44f3884fd0 for more details!