Re: smtpd error sleep time
- Thank you very much! you explaining very well! I will close my eyes in this case.
Thanks very much again!
-MottyOn Fri, Dec 21, 2012 at 10:07 AM, Noel Jones <njones@...> wrote:On 12/21/2012 11:25 AM, motty cruz wrote:The above is a good way to DoS yourself. Error sleep time should be
> I have the following in my configuration but does not seem to make
> any difference on the connection errors I see in the logs
0s or 1s, never more than a few seconds. This has nothing to do
with your log snippet below.
Those are OK, but have nothing to do with your log snippet below.> <mailto:KG.830@...>> to=<jason_griffin@...
> Dec 21 09:22:53 mas postfix/smtpd: connect from
> Dec 21 09:22:54 mas postfix/smtpd: NOQUEUE: reject: RCPT from
> unknown[22.214.171.124]: 554 5.7.1 Client host rejected: cannot find
> your hostname, [126.96.36.199]; from=<KG.830@...> Dec 21 09:22:54 mas postfix/smtpd: lost connection after RCPTIt's unclear what you want to stop. The above client was rejected
> from unknown[188.8.131.52]
> Dec 21 09:22:54 mas postfix/smtpd: disconnect from
> it's been going for about an hour and it does not stop, any idea?
with the "reject_unknown_client_hostname" restriction. The
rejection is correct as the client hostname does not have a matching
A record. (name->address mapping failed).
The client is also listed on several RBLs. If your intention is to
stop seeing rejections from this client in your logs, either close
your eyes, or firewall the IP. Unless you're getting enough
connections from this client to constitute a DoS attack, it's not
bothering postfix in the least, and not accepting any mail from the
If your intention is to temporarily block a persistent spammer, use
-- Noel Jones