On Tuesday 13 July 2004 15:10, Paul Hutchings might have typed: > > The thing that scares me about greylisting is that the CEO's > > stockbroker > > might be running Groupwise 1.0 or Exchange 4.0 or BillyBob's > > Very Good > > Mailserver 2003 which may not handle the retry smoothly. > > I'd also be concerned about some of these websites that generate emails > using a command line mailer that does direct to MX delivery.. they may not > even have the concecpt of queues/retries if it doesn't go first time.
The counter-argument could be that in this day and age, you (generic) should be running: a) RFC compliant software that can deal with 450 codes, b) software that relies on a local mail hub to deliver mail to the net. Relying on direct-to-MX is just asking for trouble - if anything goes wrong, you've got no fallback (unless the code somehow tracks it) to resend the information at a later juncture. The 'net is a constantly evolving (and thus moving) target. Running what is tantamount to obselescent software should cause you pain :>
