Michael Reeder -- Hygeia MS writes:

 > AT&T has now started blocking the IP address of the multiple 
 > auto-forwarding email addresses I set up to get around them blocking the 
 > IP address of my GNU Mailman list.

I have to conclude AT&T wants to get rid of their email provision
activity.

Is there possibly something somebody could consider spammy in your
content, such as frequent or repeated announcements of new services or
invitations to events?  Do members ever report the list traffic being
marked as (potential) spam?  Are these discussion lists among the
members, or is it all announcements from your side?

 > 37 list members at risk unless they change their email addresses.

AT&T hates them, so I recommend they get an alternative address for
list mail and eventually get off AT&T altogether.  It's not going to
get better, I imagine.  But most likely they won't change until they
get sued for nonpayment of bills invoiced to their AT&T address. :-/

 > We started 20+ years ago with a different list program and hosting 
 > provider, so we have lots of legacy members suddenly getting cut off.

Do you keep archives?  If so, an RSS feed might be the way to
communicate to them in somewhat less than real time.  Similarly,
moving to Mailman 3 + HyperKitty allows use of the archives in a way
quite similar to dedicated web forum software like Discourse.
Finally (though I hate to recommend it) you could move to forum
software or Google Groups.

I'm sorry to be putting all the work on you, but I don't think there's
anything Mailman can do.  It seems AT&T just doesn't want your list
traffic.

Steve

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