Questions tagged [greylisting]
Greylisting is a technique for fighting spam by initially rejecting emails.
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questions with no upvoted or accepted answers
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Reloading sqlgrey whitelists?
I inherited admin duties of a postfix server despite having no postfix experience. It's running a service called sqlgrey that is causing all emails from google.com to be greylisted for 30 minutes. I ...
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Delivery Status Notifications not being retried
I was checking my ISP's Out of Office reply system and I found that although they sent a message to my server, because my server replied with a 4xx error code, the server did not attempt to re-deliver ...
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Howto configure postfix to correctly handle greylisting when forwarding mail
I have a postfix setup in which I use virtual_alias_maps to forward / alias mails to other addresses. In a specific sample scenario, my server would serve as an MX for the domain mydomain.com and I ...
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POSTFIX: Limit outbound connections, message count, cummulative size in time window
We are sending quite large amount of email messages to our customers every month with Postfix. Big percentage of them have their email hosted with @example.com. But every month we are struggling to ...