Email verifier of sorts?

I am looking for a free email verifier.
I had one in the past, not sure what the name was [size=1:b83415d40d](otherwise I wouldn't be here...)[/size:b83415d40d] that wouldn't allow me to get the email unless the user has entered a special key or code to get validated/verified and that they really want to email me.

I can't remember the exact terms but it was an automatic reply that asked the sender to do something to allow the mail to reach me.

Any ideas?

Cheers

It seems that this is one topic that nobody understands or maybe my question is wrong?

I'd say this is the wrong forum for that question :)

I actually took a chance to find out if anyone else ever had, has or heard of what i am talking about.

Thanks,
Cheers.

Got it, spamPEPPER

Thanks and cheers