As Arthur said, it's very rare for non-subscribers to be sending legit
posts.

I have a further question on it: what is the use of a non-subscriber
posting in the first place, as they won't see the responses without
polling the list anyway?

I'm all for relieving the load on the list maintainers.

Thanks!

-elf

On Mon, 28 Nov 2016, Perry E. Metzger wrote:

> Date: Mon, 28 Nov 2016 16:05:00
> From: Perry E. Metzger <xxxxxx@piermont.com>
> Reply-To: xxxxxx@srfi.schemers.org
> To: Arthur A. Gleckler <xxxxxx@speechcode.com>
> Cc: xxxxxx@srfi.schemers.org, xxxxxx@srfi.schemers.org,
>     xxxxxx@srfi-schemers.org
> Subject: Re: New anti-spam measure on SRFI mailing lists
>
> On Mon, 28 Nov 2016 10:31:25 -0800 "Arthur A. Gleckler"
> <xxxxxx@speechcode.com> wrote:
>> So here's the change: starting now, messages sent by
>> non-subscribers (or from non-subscribed addresses) will not be
>> reviewed promptly, and may be deleted without any review.
>>
>> Non-subscribers will still be able to send to srfi-editors.  Also,
>> as before, only editors (me) will be able to send to srfi-announce.
>
> I think this may be suboptimal because it provides poor feedback to
> people making legitimate posts without being subscribers. They may
> never know their message was rejected.
>
> Could you instead block non-subscribers early, even at the SMTP
> dialog?
>
> I run several large mailing lists and use postfix plugins to block
> non-subscribers from posting to them at the SMTP dialog. This means
> that people posting in error get prompt error messages *and* that my
> SMTP queues remain clean.
>
> Perry
>