Soft Block & Sender Confirmation for common public email domains
It would be helpful if there was a type of "soft block" that we could use on certain domains like gmail.com, earthlink.com, yahoo.com, or aol.com just name a few.
What I'm suggesting would be similar to a receive quarantine. If an email was received from a sender at one of these domains it would go into a holding a queue and a confirmation request would be sent to the sender. After the sender confirms sending the email, it would be released to the end user. This should help prevent mass phish and SMTP spoof attempts.