Spammers seem to be really lazy. The only time I’ve received spam on my own domain was when I changed servers and forgot to enable the Postgrey service. Grey-listing has been around for long enough (a couple of decades) so I would have expected spammers to be resending emails that are rejected with a temporary error.
So I wasn’t expecting Postgrey to provide much benefit. As it happens, in 10 years of running my own mail server, it’s the only anti-spam measure I’ve had to bother with.
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Spammers seem to be really lazy. The only time I’ve received spam on my own domain was when I changed servers and forgot to enable the Postgrey service. Grey-listing has been around for long enough (a couple of decades) so I would have expected spammers to be resending emails that are rejected with a temporary error.
So I wasn’t expecting Postgrey to provide much benefit. As it happens, in 10 years of running my own mail server, it’s the only anti-spam measure I’ve had to bother with.