A problem with the MailMate mailing list is that it sends the email on behalf 
of the user, which then makes the SPF / DKIM checks to fail. You can notice it 
by checking out the DMARC reports, if you have configured it.


On Sun, Jan 27, 2019, at 19:06, Robert Brenstein wrote:
> Such notifications are most often prompted by the sending host, that is the 
> list host, suddenly deemed to be a spammer. Usually, it is a side-effect of 
> some other user of that same service causing the IP (IP range) to be 
> blacklisted. In this case, it might have been only Google thinking so, 
> rightfully or not. Google, AOL, a few other services also count the number of 
> recipients in each instance of mail and if they adjusted that limits, 
> blacklisting would be the result.


> On 27 Jan 2019, at 13:25, Benny Kjær Nielsen wrote:


>> On 27 Jan 2019, at 13:15, Arnau Rebassa wrote:


>>> I received exactly the same email and also my email address is from gmail. 
>>> No idea why.


>> 


>> And apparently it doesn't happen after you re-subscribed?
>> 
>> I haven't checked thoroughly, but it seems ~80 people with Gmail addresses 
>> were kicked off the list about 2 hours ago. I don't have time to look into 
>> the details right now. It's a complex issue and I quickly forget all the 
>> gory details :)
>> 
>> -- 
>> Benny
>> 


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-- 
Alexandru Nedelcu
alexn.org
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