Comment 1 for bug 31590

The other problem with this work flow is that a confirmation message really should not be sent to a mailing list's posting address. It's highly likely that such a confirmation message would get held for approval if the mailing list limits non-member posts. That would accidentally be okay because it's probable that the list owner is creating that connection between the team and the external mailing list, and they'll be able to see the held message and complete the confirmation process.

It's even worse though if the message gets posted to the list, because then any list member would be able to complete the confirmation.

There should be a way for a list owner to complete the confirmation (or avoid it) for setting a team's contact address to an external mailing list.