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Re: DSN blockage?

2002-04-19 16:33:49
On Thu, Apr 18, 2002 at 12:24:55PM -0700, some Guy wrote:
 Read/Delivery receipts (DSN)

In my book, "DSN" are Delivery Status Notifications - MTA messages indicating that a message bounced. Since these should be from daemons, they shouldn't be bounced to the (mailer-daemon) sender even if they couldn't deliver to the local user.

As for receipts - yes, they're tragically annoying. On some mailing lists I administer (and several which I don't directly admin, but which are managed by the same set of filters), I recently added a procmail pre-processing stage to the mailing list - intended to auto-advise users of certain problems (huge messages, attachments, HTML mail, etc). Amongst those are three different variataions on receipt requested. The filters send an advisory to the user (telling them how annoying this really would be if they received 1000+ receipts to their message), then strip the receipt request header from the message and pass it along to the list processor.

Which at least disabled their ability to annoy large numbers of users on a mailing list (it can also be used maliciously: requesting the recipt be sent to someone else's email address or back to the mailing list itself).

If you don't want receipt-requested on your own inbound messages, try this:

:0f
* ^(Disposition-Notification-To|Return-Receipt-To|Registered-Mail-Reply-Requested-By):.*
|  formail -i "Disposition-Notification-To:" \
        -i "Registered-Mail-Reply-Requested-By:" \
        -i "Return-Receipt-To:" \
        -I "X-Receipt-Request-Deleted: Yes"

 seem to prove to scumbag spammers that we exist.

Hmm, perhaps you should switch to an MUA that doesn't automatically send receipts without first confirming it with you.

---
 Sean B. Straw / Professional Software Engineering

 Procmail disclaimer: <http://www.professional.org/procmail/disclaimer.html>
 Please DO NOT carbon me on list replies.  I'll get my copy from the list.

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