[Mimedefang] Removing read receipts for particular account.
Prashanth KB
prashanth.kb at vinciti.com
Fri May 7 02:44:13 EDT 2004
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: mark.suter at miju.com.au ABN 48 065 548 496
> Fax: +61 7 3278 2343
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