Well, I read clearly what you want to do, but i am a big ANTI "no reply, auto delete" kinda guy.  It basically sends the message that you don't care about feedback.

That is unless of course you have some other way of handling people that want to send a response and communicate with you. The problem is a lot of people, (many seniors) do not pay attention to who they are replying to and just reply and hit send.

 

Now, how to do it.

For #3, you log into the account, go to settings > filtering > content Filtering.

Create A new rule. "From Address - "Specific Address" > Next, Enable Wildcards, put *.* in the box, next. Turn On "Delete Message"  Save.

One consideration, I am not sure of the order of operations, if the auto responder will trigger before the filter (delete) happens. or if the filter (delete) will fire off before the auto responder.  If the delete happens first, then you might need to set a forward to another box, and then have the 2nd box do the delete.

 

 

For #1, are you making a web page that sends the email ? Using CDOSYS ? How exactly are you sending the email ?