[Dovecot] Antispam plugin not compatible with Dovecot 2.1

Here is what I get when I try to compile the antispam plugin agaisnt Dovecot 2.1

mailbox.c: In function 'antispam_save_begin': mailbox.c:138:12: error: 'struct mail_save_context' has no member named 'copying' mailbox.c: In function 'antispam_save_finish': mailbox.c:174:12: error: 'struct mail_save_context' has no member named 'copying' Failed to compile mailbox.c (plugin)! gmake[3]: *** [mailbox.plugin.o] Error 1

The other objects compile fine.

Cheers,

Olivier