Hi, I cannot send email to one particulat receipient "firstname.lastname@example.org" from our exchange 5.5 server. I am getting undelivered mail message as here. I am able to send email to any other receipiets except this domain.
Your message did not reach some or all of the intended recipients.
Subject: test 16 june at 11:39
Sent: 6/16/2006 11:39 AM
The following recipient(s) could not be reached:
'email@example.com' on 6/16/2006 11:40 AM
The recipient name is not recognized
The MTS-ID of the original message is: c=US;a= ;p=Tradesco;l=EXCHTRAD-060616153919Z-1176
MSEXCH:IMS:Tradesco:TORONTO:EXCHTRAD 3550 (000B09AA) 550 Local user only or Authentication mechanism
Please give me solution soon.