The forum will send you an email alert to let you know that there's a PM waiting for you here on the forum. The second line of that email says:
IMPORTANT: Remember, this is just a notification. Please do not reply to this email.
It seems very few people read that. And rather than come to the forum to read their PMs, they send an email reply. Guess where that email replies goes?
To the forum admin address.
As much as we love you all, we don't want to read your personal messages. So, please, don't use email to reply to a PM. Come back to the forum to do it. Thanks.
Now back to your regularly scheduled programming.