> First, if you have never ever gotten a single FBL message from Yahoo, that > probably means your > FBL isn't set up correctly.
Or it means that the volume is sufficiently low, and the senders and recipients are sufficiently familiar with each other, that no-one ever hits the spam button. I understand that most list members here will think from the perspective of a large mail sender (thousands of messages to yahoo.com per day), for which triggering the FBL from time to time is statistically to be expected. But I am in a different category. > Have you set up a test account at Yahoo, sent yourself a message, clicked > Junk, and seen that you got the > report? I tried yesterday but the test message is still stuck in my deferred queue with the 421 error ;) > Second, what I was actually asking is if something might be sending mail you > don't know about, > due to a misconfiguration or malware. It wouldn't have your DKIM signature > so you wouldn't > get reports. I understand that. I have looked carefully for any abuse (monitoring postfix queues, monitoring outbound port 25 traffic at an upstream router and things like that) but do not see anything suspicious. I'm sure a sufficiently determined hacker will be able to hide themselves from these investigations, but at the moment I don't think it's very likely that this is the cause of the problem I am seeing (for one thing, I would expect delivery problems to microsoft/gmail too in that case). Thanks, Kasper
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