This is a new feature that is available in v5.2 and above.
To be able to converse and reply back to imported emails using SMTP, you need to fill the below details:
SMTP Host & Port
SMTP From Name
SMTP Email Address
SMTP Email Password
SMTP SSL Type
SMTP settings on the module settings page
If port 587 does not work, your SMTP server might be using a different port, or a different SSL/TLS type.
You will then be able to reply back and view the conversation history from within the abuse report page (open, closed, queued). The "Show Mail" button the in top of the abuse report detail page will only be visible if this abuse report has been imported via IMAP and the SMTP settings exist and are valid.
"Show Mail" button
Mail Plugin modal which allows you to see the mail history as well as reply back