On Dec 7, 2009, at 3:06 PM, Noel Jones wrote: > On 12/7/2009 1:07 PM, Javier Henderson wrote: >> Greetings, >> >> I am trying to configure Postfix to gracefully deal with the failure of the >> LDAP server it uses for alias resolution. >> >> It's working fine, using the LDAP server to resolve u...@domain.com to >> u...@somehost.domain.com, but if the LDAP server dies or becomes unreachable >> for whatever reason, Postfix replies with 5xx error codes about the user >> being invalid. >> > > Postfix always replies with a 4xx code when a lookup table is unavailable or > returns an error. > > If your postfix is responding with 550, it's because your LDAP server is > lying to postfix that a lookup key doesn't exist rather than reporting an > error. That's broken behavior by the LDAP server, not postfix.
Well, when I was testing, I had stopped the LDAP server, so it was not returning anything to Postfix. I probably have something else misconfigured on Postfix. I will have a look. Thanks! -jav
