Your personal email is never disclosed to anyone so there is no way for a spambot to ping back our users.
As for handling spam, yes it is a challenge but something we plan on doing to prevent spam is sending automatic authentication links to accounts we believe are posting a high volume in a short period of time. The authentication link will lead them back to a page that requires them to fill out a different captcha for each link.
Finally with regards to signatures, there is definitely OER software that exists that we can test out handling signatures and images inside the email itself.
As for handling spam, yes it is a challenge but something we plan on doing to prevent spam is sending automatic authentication links to accounts we believe are posting a high volume in a short period of time. The authentication link will lead them back to a page that requires them to fill out a different captcha for each link.
Finally with regards to signatures, there is definitely OER software that exists that we can test out handling signatures and images inside the email itself.