420 Resources unavailable temporarily – Yahoo Delivery Failures

If you are seeing large outbound queue in your email server to Yahoo with following error, there should be a problem from Yahoo MTA:

WHMCS Complete Billing and Support

420 Resources unavailable temporarily. Please try later (mta1392.mail.bf1.yahoo.com)

Yahoo had similar issues in the past.

Ref: http://tech.groups.yahoo.com/group/ymailadmin/message/17

As soon as Yahoo fixes their MTA problem, all your emails should be delivered.

Posted in Web Hosting.

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