Assertion error?

[Sebastian Spaeth]

On Tue, 14 Dec 2010 12:29:09 +0000, Josh Holland <jrh at joshh.co.uk> wrote:
> FWIW, my problem was IMAP<->Maildir, with the remote server Dovecot
> 1.0.15 out of Debian Stable.

http://manpages.ubuntu.com/manpages/karmic/en/man7/dovecot-antispam.7.html

Yep, quick google confirms that dovecot has an Antispam plugin and that,
as mentioned in the MAN file, forbids "APPEND" to the spam folder.

Sucks, I guess there is no way to deal with that but to fail and inform
the user in a nicer way than we currently do.

Sebastian