Hello,
I noticed that DSNs generated by OpenSMTPd use "Content-Type:
multipart/mixed", instead of "Content-Type: multipart/report", as
defined by RFC3461 (and described in RFC3464 and RFC3462). I wonder if
there's a reason for that?
I haven only done a cursory review of the actual multiparts themselves,
but they seem to (mostly) follow the mentioned RFCs with for example
"Content-Type: text/rfc822-headers". However, if RET=FULL, the content
type should be IMHO only "message/rfc822" and not "text/rfc822-headers",
the latter seems to be currently used for both, RET=HDRS and RET=FULL.
Need to read up on it more to get a clearer picture, though, I just
started digging into it.
Either way... I think the RFCs should be followed, want me to prepare a
patch?
I came across this, b/c I have an edge case where I need to filter
DSN (don't ask, some client's requirement), and it would be much simpler
to identify such mails with that Content-Type: multipart/report.
