Heya all,
I'm having an irrating problem develop over the past few months, although the problem is not with Astaro, but with Australia's biggest telco, Telstra Bigpond.
Bigpond have been using multiple mail servers to deliver their email, especially shifting rejected email to a 2nd, 3rd and sometimes 4th server. With Greylisting enabled, I'm getting a scenerio like this:
Original email is rejected, coming from Server1.
Email is resent, but from Server2, so is rejected again.
Email is resent from Server3, so is rejected once again.
Email is resent from Server3, and accepted.
Now sometimes it will be resent on the same server early, but you get the picture. This is basically causing up to half a day in delays, and the senders email address and email server is recorded into the Greylist DB as the last email server, so the next time they send it'll always initially reject because the primary email server never seems to be the server that resends the email, so it'll never be entered into the database.
Anyways, we're getting alot of mail from companies that use Bigpond, and this problem is has been a pain for a few months now after they started blocking port 25 and forcing people to use their email servers (this was the first time all these email servers popped up. I'm guessing they didn't anticipated the load!).
What I'd like to know, is their a way to whitelist an email server (IP or hostname), instead of just a recipient (I'm using ASL 6.002) for greylisting? Would this even be a viable way of fixing this problem?
Thanks
Matt
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