Q0607
Question
When I activate “return receipt” for example in Netscape Mailbox sending options, then I get an error message from Exim... something like not supported. Can I activate delivery confirmations?
Answer
Exim does not support any kind of delivery notification.
- You can configure it to recognize headers such as urn-receipt-to:\ if you wish.
- Some people want MSN (message status notification). Such services implemented in MUAs, and don't impact on the MTA at all.
I investigated the RFCs which describe the DSN (delivery status fication) system. However, I was unable to specify any sensible way ctually doing anything with the data. There were comments on the ing list at the time; many people, including me, conclude that DSN n practice unworkable. The killer problem is with forwarding and sing. Do you propagate the DSN data with the generated addresses? ou send back a “reached end of the DSN world” or “expanded” message? ou do this differently for different kinds of aliasing/forwarding? a user who has a .forward file with a single address in, this t seem easy - just propagate the data. But what if there are several ardings? If you propagate the DSN data, the sender may get back ral DSN messages - and should the sender really know about the il of the receiver's forwarding arrangements? There isn't really way to distinguish between a .forward file that is forwarding one that is a mini mailing list. And so on, and so on. There are so questions that don't have obvious answers.