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We've been running the greylisting package for about a year and it's helped with our spam problem wonderfully. However, I'm seeing a trend of companies moving towards cloud based services that are using more of a round robin style of mail server ( hosted services & more recently Office365) which are generating "" and "" entries, each with a new IP address for clients who have emailed me for years, causing delays of upwards of 30-45 minutes. The "" swarm is even worse at 60-90 minutes.

I've tried adding the domain to the whitelist, but when the client_name keeps changing dynamically (First message: ----- Second Message:, it seems that the greylist is becoming more of a burden. I've tried whitelisting the client domain, as well as

Now, knowing that there's nothing I can do about the client retry time, I'm looking to see if anyone else has had issues like this which they've overcome.
Thursday, May 12 2016, 04:03 PM
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    Saturday, November 26 2016, 05:47 PM - #Permalink
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    I've finally got round to trying greylisting. You may want yo update your /etc/postfix/postgrey_whitelist_clients file to the latest here. It includes whitelisting
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