This site did not show evidence of storing passwords in plaintext.
This site does allow secured connections (https)
This site did show a clear way to unsubscribe from their emails
This site does verify your email address.
Membership Emails
Below is a sample of the emails you can expect to receive when signed up to exchange software.
Thanks for registering in our website.
Here is your login data:
Login url: https://exchangesoftware.info/login
Username:
Password:
Regards,
exchangesoftware.info