Re: Better to do 550 instead of 450 for these?
- Roger B.A. Klorese a écrit :
> Victor Duchovni wrote:so what? when they fix their system, then they'll post their mail!
>> Postfix never returns 5XX for temporary lookup problems, even when it
>> returns 5XX for NXDOMAIN and other hard failures.
> How is NXDOMAIN any more a "hard" failure? An authoritative server
> could be temporarily misconfigured...
Systems should be optimized for the common case, not for rare cases.
I prefer to get a bounce telling me that my DNS server is misconfigured
than wait 4 days and get bounces for all the messages that my system
sent during that period of time.
If you don't like DNS failures, then don't base your mail decisions on
that. DNS isn't safe. If you base your smtp setup on it, then you have
the common denominator.
>To me, the world is not "me vs. them" -- the goal is getting mailIt's not 1995, or 2000.
>through, not scolding about other people's configurations.
If mail admins won't/can't setup to look like part of the solution by
now, then they pay whatever it costs to be part of the problem.
http://IMGate.MEIway.com : free anti-spam gateway, runs on 1000's of sites
- Len Conrad wrote:
> It's not 1995, or 2000.It doesn't matter if it's 1995, 2000, 2005, or 2037 -- when stopping
mail becomes more important than delivering mail, there's no point in
there being mail.
- On Sun, Jan 01, 2006 at 11:03:39PM -0800, Roger B.A. Klorese wrote:
> Len Conrad wrote:This is getting seriously off-topic. Setting the DNS-based reject codes
> >It's not 1995, or 2000.
> It doesn't matter if it's 1995, 2000, 2005, or 2037 -- when stopping
> mail becomes more important than delivering mail, there's no point in
> there being mail.
to 5XX is recommended as soon as one is confortable that the settings
are correct. Persistent 4XX rejects that *don't* represent temporary
conditions are worse for the sender.
So either use "reject_unknown_sender_domain", ... with 5XX codes after
brief testing with 4XX codes (or soft_bounce=yes), or don't use them
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