[Mailman-Users] Microsoft blocking our Mailman lists

[Lindsay Haisley]

On Sun, 2018-10-07 at 12:19 -0500, Robert Braver wrote:
> This is almost certainly not going to have anything to do with
> Mailman, but more to do with the reputation of the IP address of your
> virtual server at Linode or IP netblock ("neighborhood") you are
> sending from.

Understood. I had thought that perhaps others on this list had had
similar problems and I could get a bit of a handle on the lay of the
land with MS from others. This is indeed the case.

> If you Google around for the error you reported, you should be able to
> find a form to request de-listing. Perhaps they will while-list your
> server's IP address even if they are not thrilled with the overall
> experience with emails from Linode address space.

I got good responses here from Mark Sapiro and Stephen Turnbull with
concrete suggestions on resolving the problem. Unfortunately, Microsoft
has informed me that my IP address "does not qualify for mitigation",
so I've asked for more details.

It looks as if I may need to unload all my Mailman list hosting clients
and send them to a commercial service such as MailChimp.

-- 
Lindsay Haisley       | "The first casualty when
FMP Computer Services |         war comes is truth."
512-259-1190          |            
http://www.fmp.com    |     -- Hiram W Johnson