If you have mutt installed, you can use mutt
The command will be:
echo "message body" | mutt -s "Subject of the message" -a %f recipient_email_address
One cautionary note, make sure the mailbox you have can handle the amount of data that will be sent as well as that your provider allows for the possibly large mail messages to come through.
i.e. if you send a 2MB email, will it get through? 5, 10, 15, 20MB or larger?
An alternative might be that the email not include the file, but just be an alert that a detected/triggered recording occurred. If you have a web server on the system you could then use a web browser to access and view the recorded data.