joaquin lopez wnqggdiscozombienet tony bunce wrote anyone else issues sending mail yahoo returning 421 message temporarily deferred every message servers try send server retries like yahoo never accepts message even day retrying work much problem better organize mail system put mail servers subnet began experiencing small trickle messages would get hardly anything queues would get bigger bigger filling forms yahoos website yielded results ended keeping one server old ip routing mail going yahoo since stuff coming old ip doesnt get deferred problematic extent whitelisted days yore something joaquin lopez police bewildered said thu 07 aug 2008 175812 0700 ot yahoo deferred