I too had a similar removal also about two years ago.  Re-signed up and 
everything has gone smoothly until now.  I don't have anything to do 
with Outlook, 365, or anything Microsoft but received the same message 
as the rest of you have reported..

I suspect it must be a problem with Fermilab.


On 11/16/2018 09:38 AM, Paul Richard Thomas wrote:
> Hi All,
>
> Could somebody explain why this is happening to those not versed in
> these problems with office365 ?
>
> Is it likely that we are losing other emails or is this some
> peculiarity of the Fermilab setup? I haven't seen any similar warning
> messages but have suffered sporadically from people insisting that
> they sent me mail, which I have for sure not received.
>
> Regards
>
> Paul Thomas
> On Fri, 16 Nov 2018 at 17:29, Bruce Ferrell <[log in to unmask]> wrote:
>> On 11/16/18 9:25 AM, Franchisseur Robert wrote:
>>
>> -- Le (On) 2018-11-16 +0000 à (at) 10:25:46 Fred Liu écrivit (wrote): --
>>
>> me too
>>
>>         So  after  this message I subscribe with an other address  for
>>         nothing :(
>>
>>         Two  years  ago  I  got  the same  with  a  different  diag  :
>>
>> - The last  reported error was: 5.6.0 552 5.6.0  Headers too large (32768
>> max)
>>
>>
>> host fnal.gov
>> fnal.gov has address 131.225.105.239
>> fnal.gov has IPv6 address 2620:6a:0:105::105:239
>> fnal.gov mail is handled by 10 fnal-gov.mail.protection.outlook.com.
>>
>> So, yeah, they moved the mail relay to office365/outlook
>>
>>
>