When user sending internal company emails, emails get thru, but when she send email to outside email (hotmail, gmail, etc…), getting delivery failure- error transfering to… invalid mailbox. I tried to send to few users and all failed same way. error…:
“Error transfering to loninmrp8-i.uk.DB.COM; SMTP Protocol Returned a Permanent Error 550 5.7.1 xxx@xx.com Invalid mailbox”.
What i noticed is that from outside i cant send her emails either. The mail box can receive and send only inside (company )emails. This is the message i got when i tried to send her email from outside: " The following recipient(s) could not be reached:
xxx@xx.com on 2/4/2009 2:05 PM
You do not have permission to send to this recipient. For assistance, contact your system administrator.
< xxx@xx.com #5.7.1 SMTP; 550 5.7.1 xxx@xx.com… Invalid mailbox>"
Please help…