kazinator
today at 2:15 AM
> requiring signing up to a mailing list
A traditionally configured mailing list allows posts from non-subscribers.
All the mailing lists I operate are like this.
If you have good anti-spam-fu, you can get away with it. Plus, it's possible to have posts from non-members be held for moderation, and you can whitelist non-members who write legitimate posts.
Projects which require people to sign up to their mailing lists to participate are erecting a barrier that costs them users; it's a stupid thing to do, and unnecessary.
Whenever I have to interact with some mailing list, I begin by just sending my query to the list address. If it bounces due to nonmembership, I usually move on, unless it's some important matter.
By the way, some modern lists allow posts from non-members but then rewrite the headers in such a way that the nonmember does not receive replies! This happens in more than one way, I think. One of them is Reply-To Munging: the list robot sets the Reply-To: header redirecting replies to be directed to the list address. The Reply-To throws away the content of the original To and Cc fields.
When this happens to me, I usually refrain from further interaction with the list. I check for replies in their archive. If I'm satisfied with what they said, that's the end of it.