[Mailman-Users] Mailman Hosting

Mark Dale mark at mailmanlists.net
Fri Dec 23 01:40:48 EST 2016

Thanks for the suggestion on the mailop list Jim.

Verizon began accepting mail again for lists on the European server 
about 6 hours ago.

No light was shed as to why or what changed their view. Not only Verizon 
but AT&T as well, at around the same time - a little puzzle that's 
probably best left alone.

It may be that their default position is to block all list mail 
regardless - until they get swamped with complaints.

I've subscribed to the mailop list as you suggest, and if I learn 
anything relevant to this issue I'll post it back here.


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On 22/12/16 16:15, Jim Popovitch wrote:
> On Wed, Dec 21, 2016 at 11:42 PM, Mark Dale <mark at mailmanlists.net> wrote:
>> All the DNS records (inc SPF, DKIM) are in place, the server is on no RBLs,
>> con-current connections to the recieving mail servers is set at 2 in
>> Postfix. In short, all the right boxes are ticked as far as we can see.
>> Point noted about the time needed to build a good IP reputation. In light of
>> that, we moved the list to our old established server in Europe. It has a
>> SenderScore of 99, and of course all the same boxes are ticked. Verizon
>> still rejected list mail.
> A good place to start is on the mailop list, explain your company and
> sign-up practices/filtering, etc.  Be open and ask for specific reps
> to contact you offline if necessary.  You may get some awesome help,
> although this close to the holidays your message may not hit the right
> people until next year.
> https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop

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