On Jan 13, 2015, at 8:44 PM, Reindl Harald <h.rei...@thelounge.net> wrote: >> A 5xx reject would let the sending server know the message could not be >> delivered due a failure > > which belongs in the MTA and not the LDA > >> (ie: user policy rejection, without receiving MTA generating NDR >> backscatter). >> I would rather not just accept it and the message disappear into ether >> without >> the sender receiving any notification of why. > > hence you reject messages on MTA level before LMTP is called because taht > happens in case of sender based filters in the envelope-level and in case of > subject filters at least before the mailbody
RFC5429 clarifies the need and why "ereject" should be used vs. reject with NDR. https://tools.ietf.org/html/rfc5429 Maybe in your MTA at data time you just accept the message and bounce later (or just discard it). I have the flexibility and the choice not to. -- Robert inoc.net!rblayzor http://inoc.net/
