dovecot - Jun 2007 - APPEND fails

hi list,

i wrote a small tool in java which transfers all mails from one
imap-server account to another imap-server account using the
javax.mail API.

when i use cyrus as source and destination imap server
everything is fine.
when i use dovecot as destination server occasionally exceptions
occur when appending the mails. i was not able to see what's
really going wrong so i used wireshark to get the imap command
that fails:

A23 APPEND INBOX.MYSUBFOLDER () "14-Mar-2007 14:20:45 +0100" {0+}
A23 NO Append aborted.

this is easy to check via telnet, always the same error.
i'm not sure why the javax.mail API uses the "{0+}" but
somehow it occurs every now and then.
sending this command to a cyrus imap server does not fail.

any idea? is this a javax.mail problem?

thanks and best regards,
dirk

On Tue, 2007-06-26 at 14:09 +0200, Dirk M?ller wrote:
> when i use cyrus as source and destination imap server
> everything is fine.
> when i use dovecot as destination server occasionally exceptions
> occur when appending the mails. i was not able to see what's
> really going wrong so i used wireshark to get the imap command
> that fails:
> 
> A23 APPEND INBOX.MYSUBFOLDER () "14-Mar-2007 14:20:45 +0100" {0+}
> A23 NO Append aborted.
> 
> this is easy to check via telnet, always the same error.
> i'm not sure why the javax.mail API uses the "{0+}" but
> somehow it occurs every now and then.
It means that you're trying to save a mail that's zero bytes. There is a
bug in handling that, but probably doesn't help with your actual
problem: http://hg.dovecot.org/dovecot-1.0/rev/ba3c6dc3126c
> sending this command to a cyrus imap server does not fail.
With Cyrus 2.2.13 I see:

1 APPEND INBOX () "14-Mar-2007 14:20:45 +0100" {0+}

1 NO System I/O error

You should anyway figure out why you're trying to save a zero byte mail.
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