North American Network Operators Group|
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RE: Yahoo! Mail/Sys Admin
Do you have any users who forward their email to their free @yahoo.com addresses from your server?
That is likely the core of Justin's problem.
We've found the way to minimize issues with yahoo mail are:
1. Clean up (ideally eliminate) the .forwarders on your end. This requires some effort on your part to educate your customers on how they are making their own lives more difficult with their behaviors. Always a tough task.
2. Scour your outbound queues of garbage "be conservative in what you send"
3. Agressive delivery retries, but early discards. In other words, we've noted the yahoo MX machines seem to operate their greylists independantly, so if one stops you the next one may not. Don't wait too long before you retry but dump mail after X hours if yahoo won't accept it. We've settled on 6 hours. Any longer and it just stays backed up forever.
Let me know if you get in touch with anyone :)
I agree with Ray on this one... I'll gladly buy a sushi lunch for the first real yahoo mail admin that ever appears in meatspace. I'm convinced that there are no real humans working mail ops there.