Hot to block particular e-mail address?

I do not want to change my address but I want to block a particular person from emailing me.

Hello, I'm running an online competition and receive thousands of spam entries from different email addresses with the same domain. The domain is @easy-post.net Is there a way I can block this domain from coming through to my Outlook inbox? I'm running...

I use Google Apps. It's important that they get some kind of message saying message undeliverable, or an auto-responder etc. but has to be something that only one email address gets.

Is there any way I can go into my yahoo/ymail email account settings and block emails from a particular sender and specific email address? I don't want to entertain my ex's obnoxious emails at all. I don't even want to see 1 email from him in my Inbox...

I have a sbcglobal.net email address and I was wondering if AT&T was blocking some email form even reaching your spam folder. I have requested that www.petitionspot.com send me a “password recovery email” many times on my AT&T email...

In other words, if I want to 'send a message' (so to speak), to someone I dislike, without actually sending a message to that person, if I block their email address, will they know I blocked their address? Will they receive a 'mailer daemon' notice,...

I keep on getting inflammatory email from someone I HATE and I have been trying to add their email address x@yahoo.com to the block list but whever I do, it doesn't show up on the list, what's the deal?

I keep getting spam from the same email address. I think a friends account was hacked, because it comes from someone I know, yet they are not sending it. Anyway, EVERYTIME I get junk email from this account, I SPAM it - yet I still get email from that...

I'd like to block a specific email address on Google+, so that if they ever create an account there, they shouldn't be able to find me. Right now, this email address does not have a Google+ account. Facebook does have a way to block email addresses,...