AVG booted an incoming email into Deleted folder, why?

Hi Laura,
Please provide us with more information (detailed description, screenshot) so we can better understand what issue you are dealing with.
Thanks

Hi,

I looked at the sender and subject, it had a neighbor's name on it and said Merry Christmas. We are not email friends but have spoken occasionally, Christmas cards etc. She may have received my email address from a mutual friend, so it could be legit.
What could AVG have detected that booted it into Deleted?
Thanks in advance for any opinions.
Laura

Hi Laura,
Please provide us with more information (detailed description, screenshot) so we can better understand what issue you are dealing with.
Thanks