Hi - Is there a way of telling postfix always to use the configured smtp backup relay, regardless of the response code provided by the target mail server?
Background: I know that there are better ways, but for (personal) budget reasons I am running postfix on a dial-up DSL connection with changing IPs, domain name provided by dyndns.org. Now, as probably everybody knows, there are lists of dynamically assigned IPs, which are being used by providers for the purposes of generic blacklisting - I understand this. The proper way to work around this is to use a relay host on a "better" (non-dynamic) IP. My question is: My relay host is only allowing a certain number of relayed mails per month. So rather than sending everything through the relay, I would like to use the relay as a backup, so that mails will be sent through the relay if direct delivery fails - for whatever reason. This "whatever reason" part is my problem: It appears that even if I use smtp_fallback_relay, postfix gives up on delivery if it gets, e.g. from hotmail, a 550 because of the dynamic IP. Thanks, Christian
