On 31 May 2007 at 6:47, Daniel L. Miller wrote:

> Pasted from Postfix list:
> The response "503 .. nested MAIL command" means that ASSP messed up
> its conversation with Postfix.
> 
> Like this:
> 
> Client X connects
> 
>     ASSP forwards MAIL FROM from client X to Postfix
> 
>     ASSP replies 4xx to RCPT TO from client X
> 
> Client Y connects
> 
>     ASSP forwards MAIL FROM from client Y to Postfix
> 
>     Postfix replies with 503 .. nested MAIL command
> 
> In other words, ASSP does not reset the connection after the MAIL
> FROM from client X, so that Postfix is still in MAIL FROM state
> when ASSP forwards the MAIL FROM from client Y.

but in that example, client y will be a new 
connection from assp to postfix, with a new 
helo etc.
 
I can see what is upsetting postfix, but I 
can't understand the conditions that are 
causing it.

paul


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