spam postings and group membership

[mvesh]

Dear spinev-discuss group members,

Sorry for the recent spam postings some of you may have received in
the email. I don't know how the spammers broke in, but they did. To
prevent this happening in the future, the group membership will be
mediated from now on. In other words, all new members of the group
will have to be approved (by me). And since only members can post
messages, this should solve the problem.

Best regards,
Mikhail