No, it will by default not be visible to other users.

We have set it up so that by default nobody's e-mail address is visible. We felt this was better to secure a higher level of privacy for everyone.

If you do want to display your e-mail address, the easiest way to do so is to include it in your signature which appears with every post (but it means anyone can see it now, i.e. even without logging in). I have done it for my signature for example. To edit your signature, you first log in. Then you click on "Profile" at the top. Then you have to click on the "edit button" at the right. Then you click on "Profile information" and there it is.

We also have an internal e-mailing function which you can access by clicking on CONTACT below a person's photo on the left of the person's post. Please see this thread for more information on this internal e-mailing function:
forum.susana.org/forum/categories/135-qu...o-another-forum-user

Regards,
Elisabeth