I am getting mails daily from different mail address like
email@example.com etc. Since the mail IDs change daily, I can't filter those mails.
I checked the emails’ origin.
X-Received: by 10.224.75.69 with SMTP id x5mr811082qaj.39.1381914914355; Wed, 16 Oct 2013 02:15:14 -0700 (PDT) Return-Path: <firstname.lastname@example.org> Received: from server.rupyen.info (server.rupyen.info. [184.108.40.206]) by mx.google.com with ESMTPS id c11si34872774qey.80.19220.127.116.11.00.00 (version=TLSv1 cipher=RC4-SHA bits=128/128); Wed, 16 Oct 2013 02:15:14 -0700 (PDT) Received-SPF: neutral (google.com: 18.104.22.168 is neither permitted nor denied by domain of email@example.com) client-ip=22.214.171.124;
I found that for every mail, the mail server is the same:
How can I block/filter these mails?