Yup, susendeep is right. Either read the instructions from the first link and learn to make a filter and send it straight to trash. Filters are just like Outlook Rules.
Or, try the second link is which looks more powerful. Use it to block someone with a Gmail address from chatting with you and it appears you also block getting Emails from them.
create a filter with that email id and then apply desired action to that filter. in depth explanation given by susendeep dutta
use the filter option in the settings to block the email id.
How to Block a Sender in Gmail -
http://email.about.com/od/gmailtips/qt/et_block_sender.htm
Blocking contacts -
http://support.google.com/chat/bin/answer.py?hl=en&answer=161879
Yup, susendeep is right. Either read the instructions from the first link and learn to make a filter and send it straight to trash. Filters are just like Outlook Rules.
Or, try the second link is which looks more powerful. Use it to block someone with a Gmail address from chatting with you and it appears you also block getting Emails from them.