[MlMt] Änderung des Betreff der eingegangenen Nachrichten

Benny Kjær Nielsen mailinglist at freron.com
Fri Dec 13 03:31:12 EST 2013


On 13 Dec 2013, at 7:52, Marc ARC wrote:

@Thomas: No, there is no way to change the subject or any other part of 
a received message. You can only alter tags (IMAP keywords). IMAP (or 
emails in general) are not really designed for allowing such changes. 
For example, for IMAP it would require re-uploading the entire message 
to the server (also if it has a 20MB attachment). If I ever implemented 
anything to support such changes then I would probably do it by placing 
the changes in some kind of meta-message, but this would not work well 
with other email clients.

> Could a redirect with the addition of additional info be a solution.

When I implement redirection then I don't think I would allow changing 
the content. The standard does not even support a change of the subject 
line: http://tools.ietf.org/html/rfc5322#section-3.6.6

I could perhaps allow a `Resent-Subject` (and/ore `Resent-Note`) header 
given that I warn the user that most email clients are unlikely to 
display this value. (This would still not be very efficient with regard 
to re-uploading to the server, but at least it would be an explicit 
change of the message.)

> @ Benny: we have a similar situation and this is why i requested the 
> possibility to be able to redirect a mail, I know your vision on 
> changing mail contents and understand the risks/issues, but then again 
> if other mail clients allow it . . .

If my general measure of correctness was other mail clients...

I'll give it some more thought.

-- 
Benny
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