Hi Thanks for the reply
My problem about read receipts is just this. I have a group id whenever an external user sends mail to this group id; all the users of this group knowingly or unknowingly send read receipts to the sender. So wanted to block read receipts request for that particular group id. I wanted to block these headers Return-Receipt-To: Disposition-Notification-To X-Confirm-Reading-To Thanks in advance Regards, Prashanth > Prashanth, > >> Can any one help me in how to remove read receipts for a particular >> email id? > > Automaticaly generated emails such as return receipts, delivery notices, > read receipts and out of office replies provide a wealth of information > to a potential attacker, for example, > > * operating systems and versions > * email server software and versions > * email client software and versions > * email architecture > > Here are some headers to drop on incoming emails to prevent requests for > a receipts. Please let me know if you are aware of other headers. > > Disposition-Notification-To: > Receipt-Requested-To: > Confirm-Reading-To: > MDRcpt-To: > MDSend-Notifications-To: > Smtp-Rcpt-To: > Return-Receipt-To: > > Also consider dropping outbound NDN notices, that is, email where > > * From address is the null address > * Small, say under 5000-10000 bytes > * The subject contains one of the following (again, suggections?) > DELIVERY FAILURE: > Undeliverable: > Undeliverable message > Delivery Status Notification > Returned mail: > > Limiting actions to users or domains has been covered in many times on > this list - search the list (look at email headers for the URIs). > > Yours sincerely, > > Mark Suter Miju Systems http://www.miju.com.au/ > Phone: +61 411 262 316 PO Box 176, Corinda Q 4075, Australia > Email: [EMAIL PROTECTED] ABN 48 065 548 496 > Fax: +61 7 3278 2343 > _______________________________________________ > Visit http://www.mimedefang.org and http://www.canit.ca > MIMEDefang mailing list > [EMAIL PROTECTED] > http://lists.roaringpenguin.com/mailman/listinfo/mimedefang > _______________________________________________ Visit http://www.mimedefang.org and http://www.canit.ca MIMEDefang mailing list [EMAIL PROTECTED] http://lists.roaringpenguin.com/mailman/listinfo/mimedefang