On 2009-10-14 at 18:17 +0200, Marten Lehmann wrote:
> Hello,
> 
> we are using an autoreply transport with exim 4.69 and according to our 
> configuration:
> 
>    once = /vrmd/mailin/spool/once.db
>    once_repeat = 1d
> 
> there should be only one autoresponse per sender address and day. But we 
> recently had the case, that two autoresponders where sending more than 
> 100.000 messages to each other each day. So obviously, the limit didn't 
> work. How does exim know which address to use as key for the once-index? 
> The return-path is typically empty on auto-responses.

You are using "to = $sender_address" for the auto-reply, right?  So that
Exim is replying to the SMTP Envelope Sender?  Which would make this
impossible.

-Phil

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