text: how can i find out why a e-mail i am getting delivery status notification (failure) that i have sent ? when i sent a e-mail to a certain address it would come back to me saying delivery status notification (failure). the dsn you get back should tell you why it failed (address doesn't exist etc) if you look at the message or possibly in the attachment it sends back. their are various forms usually its because the address your trying to send to doesn't exist.   the other thing you get is delayed which is their is problem with the server your trying to send to, or a server on route to the one your sending to. usually if its delayed for two days it gets sent back as failed. if your really really really really sure that the address is correct and that you typed it in correctly send an email to the postmaster of your internet provider. so say your using aol it would be postmaster@aol.com or say your using bog it would be postmaster@bog.com telling them your having trouble sending it to such and such an address.   but as i said chances are its something your typing in thats wrong as apposed to something wrong with the way its forwarded. don't piss off the postmaster (s)he a busy person so only use it if your really sure its something wrong with the mail system.