Say if I wish not to send a email to an address even by mistake because I want to maintain no contact between the 2 emails, is it possible to set up some kind of outgoing filter to it?
Is it possible block outgoing emails to a particular address in gmail?
gmail
You can setup filters on outgoing mail to add labels, but at present there is no way to BLOCK outgoing mail to a specific address. If you are using Google Apps for Business, you can enable Postini which supports whitelist and blacklists