fchan ybmjpmolsciorg hi problem needed contact yahoocom postmaster resolved within one day yahoocom postmaster url httphelpyahoocomlusyahoomailpostmaster click contact customer care select delivery issues hope helps frank sorry topic thread im loss 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 ive filled every form yahoo support site without luck anyone else seeing problem know way get real person yahoo reports online yahoo paid support phone number fix problem one list phone number much dont want pay yahoo accept messages im running options customer complaints getting frequent every day tony bunce tonybgoconceptscom sr programming systems administrator go concepts inc phone 513 9348234 thu 07 aug 2008 173030 0800 ot yahoo deferred