Il 16/10/2013 21:46, Eric Shubert ha scritto:
I would normally answer pdns, because it's local. I'm not aware of any
drawbacks to using pdns-recursor.
Is pdns running?
# chkconfig --list pdns-recursor
# service pdns status
Are you seeing any pdns errors in the log?
# grep pdns /var/log/messages | less
Regarding your error, I've seen this historically with QMT on rare
occasions, and haven't been able to recreate the condition with any
consistency. I haven't seen it personally in quite a while.
Are you using port 587 or 25 for these submissions? Are you seeing any
corresponding log messages? (please post them if you can)
How busy is your QMT host when this happens? Might this be related to
load?
I wonder if there's something a little quirky with chkuser's code,
given that the message is coming from chkuser. That's a long shot. You
might try building qmail-toaster with CHKUSER_RCPT_MX disabled (I
don't think it's possible to do with environment variable). Please
give this a try and see if that fixes things up for you.
This setting should probably be disabled in the stock QMT anyhow, as
it makes little sense. On inbound messages, the RCPT_MX has already
been found (otherwise no connection could be made), and on outbound
messages, a missing MX would simply create a bounce back to the
submitter, and thus eliminate the question of which recipient the
error was for.
Tonino, what say you about this? We appreciate your input.
Hello Eric,
that part of chkuser code is well working and stable, and I do not see
code problems; that error code means simply DNS is not answering.
I've not understood:
* if problem is on sender or recipient (to know which domains have
problems).
* if error is immediate or delayed (to know if there are DNS loops on
local domain or external domains)
About disabling chkuser, I'd try:
Enable (uncomment) the following define, and set it to 'RELAYCLIENT'.
#define CHKUSER_DISABLE_VARIABLE "RELAYCLIENT"
So, if RELAYCLIENT is set, chkuser should not work at all for that session.
Regards,
Tonino
Another thing, is there an entry in /etc/hosts which would correspond
to one of your rcpthosts domains? I can imagine that causing a problem.
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