> Zitat von Alexander Grüner <agruener@...>:
>> my postfix just relays mails to a Lotus Notes server and the internet.
>> Internet <-> Postfix <-> Lotus Notes
>> My maximal_queue_lifetime is set to 2h which works fine. This
>> relatively small amount is because the users want to know very fast if
>> the mail is not deliverable. Earlier they sent an offer and received 5
>> days later, that it does not work...
> RFC 2821 (section 126.96.36.199) state that you should at least use 4-5 days
> to retry. If you set your value that low you go for trouble with
> slow/overloaded hosts, long greylisting or network outages. Use the
> delay_warning_time instead of breaking e-mail delivery.
> E-Mail is not a real time communication and should not be used as such.
I second that. The 5 day default provides email administrators with a
valuable safety net. Like any safety net, you hope that you will never
need it, but it had better work when you do. I've relied on it more than