[Mailman-Users] Understanding patterns of unsubscribe

[Steven D'Aprano]

On Mon, Dec 22, 2014 at 06:48:44PM -0500, Robert Heller wrote:

> Are these mass removals automatic or manual? That is, is the list doing this 
> or are your subscribers doing it?

They seem to be automatic. Unless 80+ people all decide to unsubscribe 
within one minute of each other :-)


> Some notes:  
> 
> 1) What are you doing about DMARC, DKIM, and ADSP? Remember, *Yahoo* has a strict
> reject DMARC policy. Of course this really kicks in if a Yahoo person posts.
> It *you* are the only poster and are posting from a non-Yahoo address (that is
> from a domain that does not have a strict reject DMARC policy), then this does
> not apply.

I am the only poster. It is an announce-only mailing list.


> 2) YahooGroups *does not* (AFAIK) send out monthly reminders. Mailman does.  
> Your Yahoo users might be thinking the Mailman monthly reminder is some sort 
> of robotic spam message and rejecting it.

I have monthly password reminders set to No.


> 2) It is possible that many of your Yahoo users are actually alive and well, 
> but that YahooGroups suspended mail delivery of the YahooGroups mailings. Now 
> that you switched to Mailman, these users are 'suddenly' getting these 
> messages from a mailing list they have completely forgotten about.

If they were manual unsubscribes, I would agree.



-- 
Steven