On 29.4.2013, at 21.40, Mike Abbott <michael.abb...@apple.com> wrote:
> Dovecot-2.2.1 allows empty messages to be APPENDed when using CATENATE:
> b1 append inbox catenate (text {0+}
> )
> b1 OK [APPENDUID 1366726248 12] Append completed.
>
> Contrast this with regular APPEND:
> b2 append inbox {0+}
> b2 NO Can't save a zero byte message.
>
> Note that zero-size literals are OK but zero-size messages are not. So while
> "b1" above should fail like "b2", this should continue to succeed:
> b3 append inbox catenate (text {0+}
> text {8+}
> foobar
> )
> b3 OK [APPENDUID 1366726248 13] Append completed.
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.
