From: Drew Tomlinson (drewmykitchentable.net)
Date: Sun May 31 2009 - 16:03:29 CDT

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Wietse Venema wrote:
> Drew Tomlinson:
>
>> I'm running Postfix 2.6 and using phplist to send a newsletter to about
>> 200 members of my church. All the mail makes it from phplist into the
>> postfix queue on my local machine. From my local machine, I have to
>> relay all my mail via my ISP's server. I am able to send about 10
>> messages from my local queue to my ISP before I start seeing errors in
>> my maillog:
>>
>> status=deferred (delivery temporarily suspended: lost connection
>>
>> On the next queue run, another 10 messages get through before my ISP
>> starts dropping connection again. I called my ISP and it said that as
>> long as I sent in batches of 100 or less, there were no restrictions.
>>
>> I checked man 5 postconf and see options such as
>> default_destination_recipient_limit, default_destination_rate_delay, and
>> default_destination_concurrency_limit. All the defaults seem like they
>> would be below my ISPs limit of 100 but I don't really understand them.
>> I've played with the options but still have trouble.
>>
>> Would someone please explain them to me or kick me to a link that will?
>> My head is just too thick. :)
>>
>
> Try:
>
> /etc/postfix/main.cf:
> # Changing this requires that you execute "postfix reload".
> smtp_destination_rate_delay = 10s
>
> or whatever will be sufficient to not violate the ISP's acceptable
> use policy.
>
> http://www.postfix.org/postconf.5.html#default_destination_rate_delay
>

Thank you. I did try default_destination_rate_delay = 10s before but
not smtp*_ as I though default would cover all. But I will try your
suggestion for next month's newsletter and see if it works for me.

Thanks,

Drew

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