I have a choice between sending out mail directly from my server to a message's destination (MX host), or sending mail via my domain's web hosting service. (Yes, my ISP really does allow me to connect to any SMTP server, and I have a static IP address that isn't currently listed in the Spamhaus PBL or other realtime blacklists.)
What I would like to do is to try first to send any outbound mail directly to the destination -- but if that fails due to a blacklist problem (i.e., if the destination doesn't like my mail server), then I want to fall back to sending via my web hosting service's smarthost. The reason I don't want to just send everything out via the smarthost is that my web hosting service's servers occasionally get blacklisted because of spam generated by other customers (not me). Hopefully I can avoid being penalized for someone else's misdeeds by sending out mail directly from my server to the destination. But I've run into one ISP (AT&T) which has somehow gotten my local server's IP address in its blacklist -- and if I'm unable to convince them to delist me, or if this sort of thing happens again sometime, I want Postfix to automatically try "Plan B". In general, is there any way to do what I want? Rich Wales Palo Alto, CA, USA ri...@richw.org
