smtp failure - unrouteable envelope sender address

Hi,

I wish to use nullmailer to sweep locally (system) generated mail up  
to my ISP's smart host relay, for forwarding. Host/users do not and  
will not belong to a valid mail domain. The host is a small headless  
server.

Creating the 'adminaddr' control file will deal with local recipient  
addresses nicely in these circumstances, i.e. the mail will go  
'somewhere sensible'. But I find that I will need to deal with the  
envelope sender in similar manner. At present the relay rejects any  
mail offered to it, as the sender address is unrouteable (typically [email protected] 
). I have no control over the relay.

I think that 'nullmailer-queue' could be easily adapted to read an  
'adminaddr-sender' control file and apply the same logic to the sender  
address as is currently applied to recipient addresses. That would  
solve the issue for me.

But perhaps I am missing something obvious. Is there a solution/ 
configuration already available that I have missed ?

Thanks for any help.


Martin Williams