Owen O' Shaughnessy wrote:
> On Tue, Mar 9, 2010 at 1:41 PM, Owen O' Shaughnessy
> <[email protected]> wrote:
>   
>> having a bad smtp day and I want to check my courier's tarpit, but am
>> damned if I can find the documentation for it, any pointers?
>>     
>
> Nobody else knows how to admin the tarpit either??
>
> I've ran a google search against courier-mta.org for tar, pit, and
> tarpit and zero hits relating to tarpitting come back.
>
> Does anyone know the commands I run to see what addresses are tar
> pitted?? it would be a great help to progress in this quest to
> identify serious lags in my smtp on a machine thats got perfect DNS
> resolution for affected machines!
>   

Tarpitting affects connections, not addresses.  I think what you are
looking for is the backscatter blacklist.

>From the "courier" man page:

"courier show all" lists all E-mail addresses currently blacklisted for
backscatter. "courier clear
u...@domain" manually clears <u...@domain> from the backscatter
blacklist. "courier clear all" removes all
addresses from the backscatter blacklist. When the Courier mail server
encounters a delivery failure to an
E-mail address the Courier mail server may stop accepting any more
messages to the same address in order to
minimize generation of so-called "backscatter bounces". This does not
occur in all cases, see "Backscatter
suppresion" in the Courier mail server“s installation instructions for
more information.

The Courier mail server will resume accepting messages to the
blacklisted address if the delivery attempt
originally encountered a temporary failure, and a subsequent retry
succesfully delivered the message, or if
more than two hours elapsed since the delivery failure. Use the "clear"
command to manually clear the E-mail
address from the backscatter blacklist. This may be useful if the
undeliverable message is manually removed
from the Courier mail server“s mail queue, using the "cancel" command.
Even if the message is cancelled, the
Courier mail server will continue to refuse accepting mail for this
address for up to two hours. The "clear"
command can be use to reenable mail acceptance before then.

-- 
Bowie

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