[Mailman-Users] Block calendar invites to list

[francis picabia]

OK, I find the probable answer a few minutes later.  Trying Content
filtering now.
I'm pretty sure this is what I was looking for.

On Mon, Nov 18, 2013 at 12:50 PM, francis picabia <fpicabia at gmail.com> wrote:
> We have an issue where sometimes a person creates a calendar
> item for an event, and canceling the item causes email to
> be delivered to the list.
>
> It seems the solution could be looking at MIME header tags
> indicating it is a meeting invite, and we could block all
> emails containing:
>
> ^Content-Type: text/calendar
>
> Placing that in Spam Filter rule does not capture the email,
> likely because it isn't in the top header section, but within
> the MIME encoded sections.
>
> Does this problem have a known solution?  Google didn't
> find it and I don't see "text/calendar" in my archives of
> the mailman mailing list.