Automatically moving marked mails?

[Ian Eiloart]

--On 9 July 2009 11:51:32 -0400 "Greg A. Woods" <woods-cyrus at weird.com> 
wrote:

> At Thu, 09 Jul 2009 15:46:42 +0100, Ian Eiloart <iane at sussex.ac.uk> wrote:
> Subject: Re: Automatically moving marked mails?
>>
>> There
>> probably aren't any SIEVE implementations that do what I suggest, and
>> the  implementations wouldn't be simple, but there's no principled
>> reason that  it shouldn't.
>
> Yes, I suppose something like Sieve could be used by an MTA, and it
> could be used in a per-recipient manner.  Personally I've found it best
> though to leave management of MTA level controls to system managers.

We let people create Exim filters at the MTA level, but they operate on 
delivery not as messages are accepted. They don't have access to all the 
functionality that a system filter does, but Exim filters have more 
functionality than Sieve filters.

> However Sieve in the context of this mailing list is the one inside
> Cyrus IMAP, i.e. the local delivery agent, and it confusing it with
> anything that could happen beforehand in the MTA would be very wrong.
>
> I my very strong opinion the "reject" and "redirect" actions should not
> be a part of any valid Sieve implementation.

We don't like that much, either. However, I'd be happy to allow users to 
reject specific senders (a) at SMTP time, or (b) in the event that a 
positive SPF or DKIM match were found. I don't know of any Sieve 
implementations that meet those conditions, though.

> Luckily the RFC 5228
> removed "reject" as a directly mentioned feature (leaving it only as an
> optional extension).  They probably should have done the same to
> "redirect", and it certainly should not be required to be implemented,
> but luckily implementations are required to provide a means of limiting
> the number of redirects a script can perform (as well as other required
> controls).



-- 
Ian Eiloart
IT Services, University of Sussex
01273-873148 x3148
For new support requests, see http://www.sussex.ac.uk/its/help/