Hello.

I've noticed that a message being sent to my mail server is being rejected. Relevant log messages:

Code:
Aug 14 13:35:24 mail postfix/cleanup[31058]: warning: milter inet:127.0.0.1:7026: can't read SMFIC_HEADER reply packet header: Success
Aug 14 13:35:24 mail postfix/cleanup[31058]: D8F471263905: milter-reject: END-OF-MESSAGE from domino.example.net[111.222.333.444]: 4.7.1 Service unavailable - try again later; from=<source@example.net> to=<destination@example.com> proto=ESMTP helo=<domino.example.net>
Aug 14 13:35:24 mail postfix/smtpd[30676]: warning: milter inet:127.0.0.1:7026: can't read SMFIC_MAIL reply packet header: Broken pipe
Aug 14 13:35:24 mail postfix/smtpd[30676]: NOQUEUE: milter-reject: MAIL from domino.example.net[111.222.333.444]: 451 4.7.1 Service unavailable - try again later; from=<source@example.net> proto=ESMTP helo=<domino.example.net>
Aug 14 13:35:25 mail postfix/smtpd[30676]: disconnect from domino.example.net[111.222.333.444]
Any idea why this is happening? I'm using mailfromd as a milter listening on 127.0.1.1:8026 but all it does is add and remove recipients from the envelop. It doesn't reject messages at all and in any case, the error occurs with the milter running on port 7026. I asked about what that milter does before but I haven't received any answers.

My milter settings:

Code:
zimbraMilterBindPort: 7026
zimbraMilterNumThreads: 100
zimbraMilterServerEnabled: FALSE
zimbraMtaSmtpdMilters: inet:127.0.1.1:8026
Generated Postfix milter configuration:

Code:
non_smtpd_milters = 
smtpd_milters = inet:127.0.1.1:8026, inet:127.0.0.1:7026
I hope somebody can help me find out going on.

TIA