On 04/12/2011 08:27 PM, Nicolas Barcet wrote:
On 04/13/2011 03:33 AM, Lox wrote:
Hello,
I face a problem on my shared hosting server. I have a user that
regularly sends some newsletters to about 5000 recipients. When this
happens, it prevents other user from sending and receiving message for
more than 12 hours.
There are many options in postfix so I am not sure which one to tune up
to prevent such an issue, can anyone advices me on that ?
Any advices on my postfix (attached) configuration is also greatly
appreciated...
My solution for this is to have a different postfix server handling the
distribution of mailing lists and newsletters than the one handling my
regular emails. Mailing list even have their own subdomains
"lists.mydomain.com" so that the mx is handling emails (and bounces)
separately from others.
Nick
I've done similar here. Plus on the mailing list server I've got some
strict rate limiting taking place to try to reduce the likelihood of
being blacklisted.
Blacklisting should be of serious concern here. If you're throwing out
thousands of e-mails as fast as the server can manage, the odds of some
service blacklisting the box increase.
We use the following to restrict concurrency and rate:
default_destination_concurrency_limit = 2
default_destination_recipient_limit = 5
default_destination_rate_delay = 60s
that puts the maximum possible rate as 300 per domain, per hour, with a
minute delay between attempts to send to a specific domain.
Paul
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