Re: SMTP or MIME in Strawman OPES Charter

Martin,

thanks for the examples.

Now, that makes me think whether we should have a separate *short* 
document about such SMTP related use cases. Our current use case 
document is very much HTTP specific, and something similar for 
SMTP-related use cases might be helpful.

Any thoughts?

-Markus

Martin Stecher wrote:

>>Can someone give a specific example/use case for SMTP commands 
>>adaptation ?
>>
> 
> 
> How about these:
> 
> Use Case 1:
> An MTA at a corporate gateway handles outgoing mail traffic.
> In the "MAIL FROM:" command it gets the sender's email address.
> Before replying to this command (allow/deny) it sends an OCP
> request to an OPES service that checks in the corporate directory
> service whether that employee is allowed to send mails to the
> Internet. Depending on the OCP response the MTA replies in the
> SMTP dialog with allow or deny.
> 
> 
> Use Case 2:
> The other way around.
> The MTA sends OCP requests for all "RCPT TO:" commands for
> incoming messages and asks the OPES service whether the
> recipient exists and is allowed to receive email.
> 
> 
> Use Case 3:
> Sender validation via OPES. OPES service checks sender IP,
> HELO command, resolves the sender address etc.
> This may tell the MTA not to accept the message for delivery.
> Could even be done asynchronously for some parts, i.e. sending
> the OCP request after HELO or MAIL FROM and continuing to
> handle recipients and to receive the mail body. The response
> then needs to be there before the message gets finally accepted.
> 
> 
> Regards
> Martin