tony bunce qnxepgoconceptscom feedback loop httphelpyahoocomlusyahoomailpostmastercflformhtmlfrom_urlhttphelpyahoocomlusyahoomailpostmaster takes several days receive reply form standard reply tells fill form mail postal mail even feedback loop domainkeys based instead ip based isps dont know customers sending spam yahoo least know im alone thanks input ill let everyone know make headway tony original message randy ramsdell mailtobauwbxzaelivedatagroupcom sent monday february 25 2008 151 pm cc zqoqispamassassinapacheorg subject ot yahoo deferred sm wrote 0854 25022008 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 google turned several people issue one solution dsn right spf records sign outgoing messages using domainkeys deferring connections mail servers due spam complaints regards sm incorrect rate limit everyone youre mail isnt delayed send much mail issue long remember nothing works help use dkimdomain keys rotor email different ips fill forms comply rules put whitelist formal feedback loop formally asked warn users use yahoo email addresses reason matter fact able work every large email provider isp aolcomcastnetzero etc work email issues even several contact numbers directly administrators companies yahoo simply sucks regard yet figured way properly set restrictions bulk emailers may send email going store largest numbered email accounts receive bulk mail randy ramsdell thu 07 aug 2008 195308 0500 ot yahoo deferred