Re: [Sqlgrey-users] prevent multiple headers prepended for each RCPT

[Lionel B. <lio...@bo...>]

Sascha Lucas wrote the following on 12.08.2005 14:58 :

> Hi list,
>
> I have configured sqlgrey-1.6.5 to PREPEND the X-Greylist: header. 
> What I noticed is that the header was prepended multiple times (for 
> each RCPT TO) in the mail. The logfile shows also "sqlgrey: grey: from 
> awl match: updating" for each RCPT TO.
>
> My question is: can the instance= in the postfix policy protocol be 
> used, to prevent multiple action=PREPEND .... ? From postfix's 
> SMTPD_POLICY_READM the instance=... can be used to correlate different 
> requests regarding the same message delivery.


There's a problem with that: nothing prevents two recipients for the 
same message from being treated differently (one can match a connect 
entry and the following matches the AWL entry just created:  two 
different headers). The problem is that we don't add the header on 
delivery but way before that. We have no way of adding a header per RCPT 
TO: this is a limitation of the policy protocol. We could have more 
meaningful headers with the "RCPT TO" listed for each header but I'm 
afraid it's the best we can do.

Lionel.