Since the forum is basically another form of representation of the mailing
list, I think there is no need for stripping away email addresses in the
forum or something like that. I was shocked when I saw my email in a quoted
response the first time but soon found out the connection between the forum
and mailing list and the shock went away.
The actual problem is, there is some talk about the email being only used "if
you wish to receive a new password or wish to receive certain news or
notifications by e-mail". This gives the user a false impression of what the
email address is actually used for.
One solution I imagine would be quite easy:
1. Don't call the forum just forum. Call it the "mailing list forum", or
"forum/mailing list" or something like that.
2. Put a notice to the profile of every user that the email is being used to
participate in the mailing list, which is also accessible via the website
forum.
This way no one thinks he is using a normal bulletin board forum and is aware
of being in a mailing list.
