On 14.3.2012, at 22.36, Michael Grimm wrote:
And spammers don't care about mx priorities at all :-(
But spams go to spam mailbox where duplicates don't really matter. :)
In an ideal world yes... or no.
In our deployment spam is simply header tagged and left in INBOX. Each user can decide after what they want to do with it (client side rules).
And, in the end, it is the same discussion, because the spam mailbox get replicated too and if the spam gets duplicated we are in the worst scenarios... knowing that spam represents 95% of all email traffic (in a real-world public-facing system).
;)
hehe... in the meanwhile I looked a little on the ietf and there are different RFCs out there on disconnected clients and UIDPLUS and other nice features ;) let me know if you are interested to get some help in implementing it :D