Re: [Dovecot] CATENATE allows empty messages

Quoting Timo Sirainen tss@iki.fi:

On 30.4.2013, at 0.12, Timo Sirainen tss@iki.fi wrote:

...

This could be changed I guess, but I don't think it's a bug. I
don't see anything in RFC 3501 prohibiting saving empty messages.
Only the MULTIAPPEND RFC says:

 A zero-length message literal argument is an error, and MUST
 return a NO.  This can be used to cancel the append.

But that doesn't prohibit zero-length CATENATE parameters.

Also another way to generate empty message is to give URL to an
empty MIME part. Should such APPENDs also fail? I think if there's
no good reason to disallow empty messages I'll just keep the code as
it is and allow them.

Some clients treat IMAP as a pseudo-filesystem (e.g. Kolab), so I
would agree that limiting what can be stored is a bad idea.

michael