On 04/11/2016 12:22 PM, Jeff Potter wrote: > Gordon, could one potentially change the replies after the first RCPT TO to > 4xx responses, to ensure the incoming message is being delivered to exactly > one user?
Not exactly. Courier's mail filtering API only issues one call, after the body is available. There's a separate API to run users' mail filters with maildrop's embedded mode, but unlike Sendmail's milter API, Courier's API isn't available at every stage of the SMTP conversation. Could it be? You could probably patch milter support into the Courier SMTP server, sure. > Admittedly, this would require a change inside courier itself (unless MAXRCPT > applies to incoming SMTP transactions too?), and I could see poorly > implemented SMTP servers trying to deliver getting gummed up by it… Well implemented or poorly, you'd be forcing retransmissions for every user. If there were no delays, that'd merely increase your bandwidth utilization. Proper implementations are going to back off on retransmissions, though, so every user after the first is going to get that message much later than the first delivery. ------------------------------------------------------------------------------ Find and fix application performance issues faster with Applications Manager Applications Manager provides deep performance insights into multiple tiers of your business applications. It resolves application problems quickly and reduces your MTTR. Get your free trial! https://ad.doubleclick.net/ddm/clk/302982198;130105516;z _______________________________________________ courier-users mailing list courier-users@lists.sourceforge.net Unsubscribe: https://lists.sourceforge.net/lists/listinfo/courier-users
