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Exchange 2007 SMTP connector

Hello,

I have Exchange 2007 SP2 and before 18 october everything working fine, after 18 i start getting this error message
smtp112.biz.mail.sp1.yahoo.com #553 From address not verified - see http://help.yahoo.com/l/us/yahoo/mail/original/manage/sendfrom-07.html ##

from 18 till yesterday the user must send the email two to three times to be delivered and today i start getting all the mail bounced, i contact yahoo but there no clear message from them, i have arround 6 domains , i try all of them but with no luck all mail are bounced today.

from microsoft outlook (no send connector) working fine - from online same working fine, when i start using smtp connector it stard bounce the mail.

please i need your help

ASKER CERTIFIED SOLUTION

morpheios

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rasa78

ASKER

thanks morpheios, but still the same problem :( yesterday some mails are going and some bouce , but today nothing are going i also disabled the antivirus (Symantec EndPoint protection) but still the same problem.

SOLUTION

nashim khan