Re: [courier-users] SMTP relay from a given IP address and a given sender

[Olivier S. <ob...@fr...>]

Sam Varshavchik wrote:
> Olivier Sannier writes:
>
>> Hi all,
>>
>> I'd like to use courier as a SMTP relay in the following conditions :
>>
>> - the From header must be equal to a predefined value
>> - the IP address of the connected server must be equal to a 
>> predefined value
>>
>> If those conditions are met, then the email is accepted and then 
>> relayed to whatever destination domain was specified in the email. 
>> Relaying should not be done for any other case.
>> I'm quite sure this is possible with courier, but I couldn't manage 
>> to find this in the documentation nor through the webadmin CGI script.
>
> Courier does not support granting of relaying privileges based on the 
> contents of the From: header.  And I do not know if any mail server 
> that does this.
>
> Absolute relaying privileges can be given to any range of IP 
> addresses.  Also, relaying privileges are given after any successful 
> SMTP authentication.
>
> You probably want to use authenticated SMTP.  Nothing needs to be 
> configured.  Courier will give relaying privileges to anyone who 
> provides a valid userid and password. 
Ok, fair enough.
What would be the best would be to have a specific user/password 
combination for this, and that this user cannot actually receive any 
email. Sending anything to him gets bounced back. Can using a virtual 
user without actually creating its directory work for this?

Thanks for any help