On 2021-04-07 11:57, Maurizio Caloro wrote:
> Today I have activate postscreen on mailserver, now one email will now
> reject but I understood that this
>
> Will be delivered after some time….. "this are like in waiting"
Depends. There are some transactional mail senders which do not
retry.
> Apr 7 18:49:36 ail postfix/postscreen[32484]: NOQUEUE: reject: RCPT
> from [40.92.73.101]:47169: 450 4.3.2 Service currently unavailable;
> from=
[hidden email], to=
[hidden email], proto=ESMTP,
> helo=<EUR04-HE1-obe.outbound.protection.outlook.com>
Microsoft's outbound server farm certainly WILL retry. I do not
know, however, if they will retry from the same IP address.
> Please how long will this action take, or its possible to shorting
> this time?
That's entirely up to the sending client. Most should retry in a
matter of minutes.
The delay can be avoided if the sending client is whitelisted, and
indeed all the Microsoft outbound farm hosts are listed in
list.dnswl.org's whitelist.
> Or I need to understood more about this postrscreen?
You definitely do.
You should not have enabled the after-220 tests before you
understand what they do and what they cost you.
http://www.postfix.org/POSTSCREEN_README.html is the primary
reference.
http://rob0.nodns4.us/postscreen.html is my own configuration. It
includes an example of the aforementioned whitelist feature
(
http://www.postfix.org/postconf.5.html#postscreen_dnsbl_whitelist_threshold
).
--
http://rob0.nodns4.us/
Locked
