Hotmail is doing the same thing. This has something to do with a tag  
on the messages. It seems that the email from the same folks is being  
flagged as spam.

Tom Barber
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On Apr 1, 2016, at 5:46 PM, Ken Copenhaver wrote:

Do other Gmail users have a problem with VTBird messages being tagged as
Spam?  Lately, about half of them are going to the Spam folder.  I have
VTBird in my Contacts, and I have a filter set up to send messages from
VTBird to a folder (i.e., "Label" in Gmail terms).  Does anyone have a  
for this?

Ken Copenhaver