text_combined: leonardo rodrigues magalhães odjhrbqyysolutticombr andras galos escreveu problem set postfix fake secondary reject mail except spamtrap messages think confuse legit mtas get 4xx secondary get response secondary may try send message instead primary additionally may show error message sender could confuse senders legit mtas try mx published dns order next try couldnt delivery try respect mx priorities means try lower mx priority first next mx priority second mta bounces message 4xx error mta nonrfc compliant believe happen sometimes kind problem greylist dumbass mtas understand 4xx greylist error bounces message course wrong mta never bounce 4xx error atenciosamente sincerily leonardo rodrigues solutti tecnologia httpwwwsolutticombr minha armadilha de spam não mandem email xajfwcsaasolutticombr spamtrap email wed 06 aug 2008 014211 0200 postfix fake mx