On 10/03/2020 19:49, Dominic Raferd wrote:
My responses seem like OP's:
# host -t mx imake.ro 8.8.8.8
Using domain server:
Name: 8.8.8.8
Address: 8.8.8.8#53
Aliases:
Host imake.ro not found: 2(SERVFAIL)
# host -t mx sometotallyINVENTEDdomainTHATdoesNOTexist.com 8.8.8.8
Using domain server:
Name: 8.8.8.8
Address: 8.8.8.8#53
Aliases:
Host sometotallyINVENTEDdomainTHATdoesNOTexist.com not found: 3(NXDOMAIN)
I read this as: imake.ro exists but is not configured.
On 10.03.20 20:07, Catalin Bucur wrote:
Right. And for this type of domains (bad configured) I want that
postfix warn me as soon as possbile, not after a few days.
This is impossible. The error can e.g. mean that the zone is broken and
admin as to fix it, which may be done within minutes.
This kind of error can of course last for months or years, but we can't know
that yet. Neither can postfix or DNS client.
I have similar problems with long-term unreachable addresses, where I would
prefer to block mail from/to such domains, when they are inaccessible for
some time.
Wietse advised policy service and log watcher that would extract info about
such domains:
https://marc.info/?l=postfix-users&m=157910384501532&w=2
I'm afraid I don't have enough of time to build it, otherwise I'd propose
you to use it already :)
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