I'm not being able to send e-mails from my gmail account to any yahoo users. Why was my e-mail blocked?

Every e-mail sent by my gmail account to yahoo users (usually @yahoo.com.br) are being rejected:





Technical details of permanent failure:


PERM_FAILURE: SMTP Error (state 16): 554 Message not allowed - UP Email not accepted for policy reasons. Please visit http://help.yahoo.com/help/us/mail/defer...





How do a take my e-mail off this "black list"? I'm not a spammer!
I'm not being able to send e-mails from my gmail account to any yahoo users. Why was my e-mail blocked?
Try to contact yahoo and report them the problem and ask them to remove you off that list:





http://help.yahoo.com/l/us/yahoo/mail/or...
name latin