mouss-2 wrote:
>
> NeoSHNIK a écrit :
>> Hello,
>> I am writing a plugin for SA which needs to treat outbound and incoming
>> emails differently. So ideally if the message is outbound I call one
>> subroutine in my plugin, if not I call another.
>> So is there any way to check what type of email it is in SA? I couldn't
>> find
>> any.
>> Someone said that it is possible to run two copies of Postfix MTA - one
>> for
>> incoming, other for outgoing messages.
>
> There is no need to run two copies.
> - the recommended way is to enable the submission service in master.cf
> and have outbound mail use port 587
> - but even if you use port 25 for both MX and submission, you can use an
> access check that returns a FILTER statement which sets different
> filters for inbound and outbound mail). a google search (or search
> postfix-users archives) will give you examples (I think I posted one
> recently).
>
>> And I guess then it would run two
>> copies of SA with two different plugins that I write.
>
> This depends on your setup. There is nothing automatic here.
>
>> But there has to be an
>> easier way to do this.
>> When the Postfix receives an outgoing message it stores it in the
>> ".../Mail/send" right?
> No. The Sent folder has nothing to do with smtp. This folder is accessed
> by your MUA via IMAP (so you won't find it on the server if using POP3).
>
>> So if it stores it before it calls SA my plugin could
>> search in that file by message-ID. Thank God string searching is easy in
>> Perl.
>>
>
> but unreliable. any spammer can forge message-id's and other headers.
>
>> I could also hardcode the email addresses of the users behind the server
>> with SA, but then it would not be safe nor would it scale with high
>> amount
>> of users in the network.
>>
>
> if you really want scale, use different machines;-p Divide and conquer...
>
>> Any suggestions?
>>
>
> unless you run two instances of spamd (or amavisd-new or ...) or you run
> spamassassin command (not good for perf) with different options, SA
> doesn't know if mail is inbound or outbound. The difference between
> inbound and outbound is at reception time. In general, outbound mail
> comes from a trusted client or was sent with authentication, but this
> not necessarily true for every setup.
>
> You could look at headers (either postfix headers or X-Relay-External).
>
>
mouss-2, thanks a lot for a quick and detailed response!
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