In yahoo's case they implements a set of rules known as DMARC that 
mailing lists end up tripping.  The problem isn't that they implemented 
DMARC it's that they make it completely accept or reject rather than 
have it effect an overall score of the email and then accept or reject 
messages based on that score.
My personal opinion is that if someone is sent a message they should 
receive that message.  Any spam filters should simply classify a message 
as spam or not and then allow the end user to deal with it.

"Sorry for the late reply, you message went into my spam folder" is way 
better that "I don't get it, people say they are sending me stuff but 
I"m not getting it"

Brian Cluff

On 12/11/2014 06:41 AM, Keith Smith wrote:
>
> That would be good.  From what I understand a lot of people sign up for
> news letters that they do not open.  This has caused the the industry to
> start bouncing those messages.  I'm not sure if I have this right, so
> correct me if I am wrong, there is some sort of rating system based on
> the quality of subscribers.  That rating effects delivery and is based
> on bounces and non opened emails.  The funny thing is I receive several
> emails that I routinely do not open and they just keep coming.  I open
> every PLUG email and that is one of the emails that was effected.
>
> If I were Yahoo, I would want to reduce the number of emails the deal
> with.  I get over 100 spam emails a day in my Yahoo account and maybe 20
> emails I want.  Think about the resources that Yahoo used to deliver all
> that extra email.
>
> Unfortunately until they figure out how to ID real spam we will be left
> to deal with these issue.
>
> Spam has become a real issue with me.  Most of my email accounts now
> receive some level of spam.  I might spend 5 or 10 minutes a day dealing
> with spam.
>
> By the way my snail mail box gets lots of spam also.  Unfortunately most
> of it goes to the recycle bin, which uses up lots of natural resources.
>
>
>
>
> On 2014-12-10 22:21, Brian Cluff wrote:
>> It sure would have been nice if Yahoo would have made a way that we
>> could have registered our mail server with them as serving out mail
>> that people actually wanted and therefor skipping certain checks that
>> cause the mail to bounce.
>>
>> ...but they didn't, so now a ton of people no longer us their service.
>>
>> Brian
>>
>> On 12/10/2014 03:08 PM, der.hans wrote:
>>> Am 10. Dez, 2014 schwätzte Keith Smith so:
>>>
>>> moin moin Keith,
>>>
>>> Yahoo made a change that broke mailing lists and failed to care.
>>>
>>> http://wiki.list.org/display/DEV/DMARC
>>>
>>> ciao,
>>>
>>> der.hans
>>>
>>>> For some reason I was experiencing trouble with several lists I belong
>>>> to. Yahoo would bounce the emails.  I ended up adding an email account
>>>> to my private domain so I can continue sending and receiving emails
>>>> to/from those lists.
>>>>
>>>> I can tell you if you own a mailing list you are taking a beating with
>>>> what is going on with the mail providers.
>>>>
>>>>
>>>>
>>>>
>>>> On 2014-12-10 14:43, Brian Cluff wrote:
>>>>> Unfortunately his problems isn't with sending mail to the list. He's
>>>>> not getting it back.  The server reports that it is successfully
>>>>> delivering the mail and then his server is discarding it for some
>>>>> reason.
>>>>> I'm guessing an overly aggressive SPAM filter where the admin has
>>>>> decided that they knows best what should end up in his mailbox.
>>>>>
>>>>> Brian Cluff
>>>>>
>>>>> On 12/10/2014 07:49 AM, Keith Smith wrote:
>>>>>> I got it
>>>>>>
>>>>>> On 2014-12-09 23:42, joe@actionline.com wrote:
>>>>>>> Test message 1412-09 at 10:42
>>>>>>>
>>>>>>>
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>>>>
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