On 29 Mar 2016, at 19:36, John Hardin wrote:
So, a message that's explicitly multipart MIME but which has only one part? Or does it actually have multiple parts, just none are marked as text/plain?
multipart/report; type=delivery-status. The standard MIME delivery status notification structure. 2 very similar RFCs on it. Has 3 (or 4?) parts. All except the first part (which IS text/plain; charset=us-ascii but in Sendmail's case has no Content-Type header saying so) have proper message/[thisandthat] CT headers.
Can you send me some samples?
Probably. Tomorrow. Afternoon. When I can spin up a bullshit VM (what still uses sendmail with a default workingish config?) or sanitize examples made via real stuff.
OR: if you can submit mail through a Sendmail instance, send mail to any bad address anywhere on any machine running any MTA, all it has to do is say '5yz blah blah we hate you' to some part of your attempt to send mail. On any machine with a working classical Sendmail-managed mail subsystem you can just do 'echo "foo" |mailx -s 'any subject' nonexist...@non-local.but.existing.domain' and get one of your very own for a bogus address of your choice delivered to /var/spool/mail/yournamehere or somewhere like that. Unless your Sendmail is configured to not send MIME DSNs. In that case, fire your sysadmin.
sorry if that's incoherent babbling, I can't tell. not awake. typed and randomly abridged but not really proofread
-- Bill Cole Not here right now.
