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Hello, we are using LDAP for mail routing with Postfix. We have moved the
directory infrastructure and we can now do things without tearing down
servers, but ... when a server is not able to perform a search it send back
a bind referral.

How does Postfix react to this?

I see this in the logs:
Aug 30 18:10:27 correoe1 postfix/proxymap[19744]: warning:
dict_ldap_connect: Unable to bind to server ldap://10.0.1.6:389
ldap://10.0.1.7:389 as cn=bind dn here: 9 (Partial results and referral
received)
Aug 30 18:10:27 correoe1 postfix/smtpd[19816]: NOQUEUE: reject: RCPT from
mailfwd.nih.gov[128.231.90.106]: 451 4.3.0 <[email protected]>:
Temporary lookup failure; from=<[email protected]>
to=<[email protected]> proto=ESMTP helo=<relay.hub.example.com>

It seems that postfix tries does not know what to do, as the system in the
referral is not reachable (that is what might require second thoughts), but
the firewall produces an immediate TCP reset, so 10.0.1.6 should, IMHO, be
considered unreachable and 10.0.1.7 tried instead.

Am I totally confused? Is this the intended flow?

Thank you.
- --
Victoriano Giralt
Systems Manager
Central ICT Services
University of Malaga
SPAIN
- -
A: Yes.
| > Q: Are you sure ?
|> >> A: Because it reverses the logical flow of conversation.
|>> >>> Q: Why is top posting annoying in email ?
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