[Mailman-Users] huge delays in email posts?
drew.tenenholz at isid.org
Wed Jan 11 22:26:39 CET 2006
Receiving mail to the server and the server sending the mail are
independent actions. So it it certainly possible for inbound
messages to arrive just fine while outbound traffic is very slow.
Each of your outbound messages has to have the domain translated into
numbers (e.g. *@python.org goes to mail.python.org which is
126.96.36.199). If your server cannot do this translation for
itself (i.e. is a DNS server as well as a Mailman server), then it
has to ask an assigned DNS server for the translation. If this Plesk
server's settings are not well-formed, then it may take a long time
for each message to get the translation done, resulting in outbound
delays for all messages. That's what happened to us.
Our Majordomo server had been doing it's own DNS, then someone turned
it off without really directing it to use a different DNS server. So
it sort of hunted around for an available DNS server somewhere in the
world for EACH outbound message. Once the sysadmin tracked down what
was happening and reinstated the server's own DNS resolution,
everything returned to normal speed.
>Thanks for getting back to me. Would it matter that messages making
>it to the mailman Plesk server are getting there just fine very
>fast? In other words, sending email to the domain seems fine, it
>just routing it back out to members is what is taking so long.
>>You might want to look into how the DNS resolution is being done
>>for this server. We're just getting started with mailman, but saw
>>major delays with our much larger (38,000 subscriber) majordomo
>>list when DNS resolution was turned off on the server and all DNS
>>queries were rerouted to an outside DNS server.
>>Things that had taken minutes started taking several hoursor even a
>>day to complete, just like you. Since the moderators of the list
>>have all signed contracts to deal with posts within 4 hours, they
>>were understandably upset over the delays.
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