Solved
Problems sending an Alert to a single internal address
I have used the Send Alert function several times and I have never had a problem. but for some reason there is a single email address that will not receive the alert, when I look in the activity log it get this as an error:
550 [internal] [oob] The message was blocked by the receiver. Not sure why this is happening
550 [internal] [oob] The message was blocked by the receiver. Not sure why this is happening