Hello,
i need you expertise and support concerning the "pipe" implementation on ZCS FOSS 8.0.4.

I follow this wiki but dunno why I got

"to=<xxx@example.com>, relay=127.0.0.1[127.0.0.1]:10024, delay=0.42, delays=0.02/0/0/0.39, dsn=5.4.0, status=bounced (host 127.0.0.1[127.0.0.1] said: 554 5.4.0 id=08027-19 - Rejected by next-hop MTA on relaying, from MTA(smtp:[127.0.0.1]:10025): 554 5.4.0 Error: too many hops (in reply to end of DATA command))"

this messsage appears after lots of:

Aug 30 17:39:52 zimbra postfix/cleanup[8753]: 06F888C0493: message-id=<DUB105-W13B2EECE65826A0FA2FDE0D2350@phx.gbl>
Aug 30 17:39:52 zimbra postfix/qmgr[8727]: 06F888C0493: from=<yyy@example2.com>, size=9693, nrcpt=1 (queue active)
Aug 30 17:39:52 zimbra postfix/amavisd/smtpd[9596]: 66ECE8C0491: client=localhost[127.0.0.1]
Aug 30 17:39:52 zimbra postfix/cleanup[8753]: 66ECE8C0491: message-id=<DUB105-W13B2EECE65826A0FA2FDE0D2350@phx.gbl>
Aug 30 17:39:52 zimbra postfix/qmgr[8727]: 66ECE8C0491: from=<yyy@example2.com>, size=10124, nrcpt=1 (queue active)
Aug 30 17:39:52 zimbra postfix/smtp[9611]: 06F888C0493: to=<xxx@example.com>, relay=127.0.0.1[127.0.0.1]:10024, delay=0.52, delays=0.02/0/0/0.49, dsn=2.0.0, status=sent (250 2.0.0 from MTA(smtp:[127.0.0.1]:10025): 250 2.0.0 Ok: queued as 66ECE8C0491)
Aug 30 17:39:52 zimbra postfix/qmgr[8727]: 06F888C0493: removed
Aug 30 17:39:52 zimbra autoresponse[9700]: An autoresponse has already been sent from xxx@example.com to yyy@example2.com within the last 60 seconds
Aug 30 17:39:52 zimbra postfix/pickup[8726]: 9A7658C0493: uid=502 from=<yyy@example2.com>
Aug 30 17:39:52 zimbra postfix/pipe[8759]: 66ECE8C0491: to=<xxx@example.com>, relay=autoresponder, delay=0.21, delays=0.1/0/0/0.11, dsn=2.0.0, status=sent (delivered via autoresponder service)
Aug 30 17:39:52 zimbra postfix/qmgr[8727]: 66ECE8C0491: removed

I got the output of my pipe script (a kind of "autoresponse"), but after lots of previous message i got another mail Undelivered Mail Returned to Sender‏ with "too many hops" indication.

I customize header_checks (to remove localhost receiver part), i tried to restore original header_checks but the same problem occur.

Can you help me?
Thank you!