I can understand that if using a set of UIDS or a UID range it would be 
complicated to return a fully-descriptive result and from what I can see, the 
IMAP RFC author was trying to avoid this complexity.

However, it someone specifies JUST ONE UID and that UID is non-existent, then a 
NO response could be a more useful response.  I know the spec allows a response 
of OK but it is possible that this was not the intention for a single 
non-existent UID.

Regards

Attila


-----Original Message-----
From: Timo Sirainen [mailto:[email protected]] 
Sent: 26 March 2012 15:46
To: Attila Sipos
Cc: [email protected]
Subject: Re: [Dovecot] dovecot-1.2.9: OK No messages copied

On Mon, 2012-03-26 at 14:28 +0100, Attila Sipos wrote:

> When I issue an IMAP copy command using the wrong UID, the server 
> gives an "OK No messages copied" response.
> 
> This seems like the wrong response to me.
> If the UID doesn't exist, then it should respond with a "No" response 
> - maybe something like "NO - copy error: bad UID"
> 
> I believe "OK No messages copied" would only be a suitable response if 
> the email with the supplied UID had already been known to be copied 
> successfully.
> I am using dovecot 1.2.9 - has this been fixed in newer versions of 
> dovecot?

Dovecot's behavior is correct. This (or things related to this) has been 
discussed in IMAP protocol mailing list. Basically it's not an error to use 
nonexistent UIDs. If you want details, ask in IMAP protocol ml and someone will 
probably explain.



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