[Dovecot] Redirecting mail gives 'mail forwarding loop' to the sender - calling for sieve help

Greetings, i am testing:

• dovecot-1.2-sieve-0.1.11
• dovecot 1.2.3
• dovecot-1.2-managesieve-0.11.8 (with patch)

I am trying to use sieve_after to execute some redirection of mails.

I have put in the after script:

require "include"; require "fileinto";

if header :contains ["To","Cc"] "userA@acasalud.com.ar" { keep; redirect "userB@acasalud.com.ar"; }

The redirection works but the sender user (userA) get the following error:

This is the mail system at host acamail.acasalud.com.ar.

I'm sorry to have to inform you that your message could not be delivered to one or more recipients. It's attached below.

               The mail system

http://10.11.0.21/webmail/src/compose.php?send_to=ayacopino%40acasalud.com.a...>: mail forwarding loop for userB@acasalud.com.ar http://10.11.0.21/webmail/src/compose.php?send_to=ayacopino%40acasalud.com.a...

Could somebody can help me.

Thanks,

--

Andrés Fernando Yacopino