Am 07.01.2015 um 22:38 schrieb James B. Byrne:
On Wed, January 7, 2015 16:29, li...@rhsoft.net wrote:
Hi

are there some data which value is acceptable for
"postscreen_greet_wait" to not end in legit SMTP servers give up and
try again later?

Klensin                     Standards Track                    [Page 56]

RFC 2821             Simple Mail Transfer Protocol            April 2001

    An SMTP server SHOULD have a timeout of at least 5 minutes while it
    is awaiting the next command from the sender.

Of course, some admins do things differently.

thanks!

well, that's the other direction while in general the question goes more in the direction of practical expierience of legit smtp-*client*-timeouts in the wild

given that we have "postscreen_greet_ttl" the impact for legit mail is low *as long* the sending server don't give up the first time it needs to pass the tests and with around 3500-5000 legit mail each day there is no rush at the moment

BTW: mailgraph in the meantime shows a *dramatical* breakdown in delivery attemts from the moment of the config change

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