[fetchmail]antispam codes, From filtering

[Scott Ingram]

> On 18/07/05, Scott Ingram <scott@ingram.bz> wrote:
>>
>> Is it possible to change the behavior of fetchmail so that it
>> doesn't delete the mail on the server in response to an anti spam
>> message from the SMTP listerner on port 25?
>
> Sure, don't configure any anti-spam codes.  Quoting the man page:

Well, I haven't.  I also didn't build it, I'm using a Debian binary. Is
it possible that antispam actions were hardcoded in the build?  Otherwise,
I would have expected the default behavior I desire.

>
> Return codes which fetchmail treats as antispam responses and discards
> the message can be set with the 'antispam' option. This is one of the
> only three circumstance under which fetchmail ever discards mail (the
> others are the 552 and 553 errors described below, and the suppression
> of multidropped messages with a message-ID already seen).
> <---SNIP--->
> By default, the list of antispam responses is empty.
>
>> In my case in particular, I'm using a MS IMAP4 server, and exim as the
>> MTA.  When exim returns a "550 rejected: administrative prohibition" then
>> fetchmail sends an expunge command to the IMAP server.
>
> What's it supposed to do?  A 5xx error is a permanent failure error -
> it means that the mail can never be delivered.  There's no point in
> keeping it around.  Fetchmail does the sensible thing, it sends a
> bounce message and purges the mail.
>
> If that's not what you want, don't use a 5xx series code for temporary failures!
>

I do need a permanent (or at least persistent) failure from this particular
sender, as the content is actually dealt with by a process on the IMAP
server.  Suggestions for something other than 5xx code?

> --
>                  Please keep list traffic on the list.
> Rob MacGregor
>       Whoever fights monsters should see to it that in the process he
>         doesn't become a monster.                  Friedrich Nietzsche
>
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-- 
Scott Ingram
Chesapeake Beach, MD 20732-9414