On 2010-01-28 18:56, Trevor Cordes wrote:
I have an apparent greylisting issue with Shaw. I wonder if anyone else has noticed this. Shaw's mail server appears to only try either a few times or for a limited amount of time and then give up. I get lots of logs like the following (names have been changed to protect the guilty). After that, no further hits from that from address.
I had my greylisting time set to 29mins, but have now changed it to 15mins to try to get within the Shaw window.
Anyone else with a >16 min greylist delay might want to check their logs for similar behaviour, and/or take reports of missing emails more seriously. Please report back if you see similar behaviour.
As I pointed out in another posting, I've got a maximum delay of 14 minutes on one mail server, and less elsewhere. I don't see much to be gained with a larger delay than that.
I'm not sure this is relevant to your problem, but we've seen another issue with greylisting, e.g. in trying to accept mail from gmail.com servers. The problem there is that they don't necessarily (or even typically) retry from the same client IP address, so auto-whitelisting doesn't help, and you're almost always telling them to come back again later. We've had to whitelist entire IP ranges for gmail to get around this problem.
In any case, there are a lot of "legit" mail servers out there that don't seem to handle greylisting well, which is why the default configuration with milter-greylist comes with a whole list of "broken mta" address ranges to whitelist. Perhaps you'll just need to do the same for Shaw?