Sorry, but you've posted this message in the wrong place. This forum is for questions regarding the Application Programming Interface (API) for Yahoo mail (which is how to write computer code to interact with Yahoo mail servers.) I don't work for Yahoo at all, so I don't know where to direct you, but you're not going to get any answers to this question here.

QUOTE (Diko @ 20 Dec 2011 4:32 AM) Hello,

I have had two yahoo user IDs for years.. they just differ with "_". they BOTH sign in to one account. they are aliased. but i have only one email address... can't use the second one... if I send an email to the second ID, I receive delivery report.  if i try to add extra y! mail account with the second ID, it says it is taken... but that is mine...
many people get confused as there is only one difference, so I wanted to add the other account too... 
Help appreciated a lot! thanks