several of my web hosting clients have been having trouble with their email not getting through, recently. i went through a frighteningly similar situation last year, which ended up with my moving my web sites, lock stock and CGI scripts, to another server with a different IP address… same host provider, just a different IP address. the reason was that, for some unexplained reason, the IP address kept getting listed in the CBL… which means that someone using that shared-hosting machine (not me, or any of my clients) was using it to sent spam.
the same thing has happened again. i complained, they suspended someone, it didn’t fix the problem, they told me that it takes time to propagate, i waited, it didn’t fix the problem, i complained again, they told me that it was an exim misconfiguration, that didn’t fix the problem, i complained again, they told me that they had written to the CBL to get answers…
well, guess what?
copied from the CBL home page: “There is no supporting data or “evidence” file available for any given listing, and no mechanism to ask why any given listing took place.”
so i wrote back to them, and said “whatever is causing the IP to be relisted hasn’t gone away, and won’t go away with you guys waiting for a response that won’t come.”
whereupon they closed the ticket with no further response.
maybe it’s time to start looking for a cheap VPS… 😐