Enter tracking number reference of The Exchange

social.technet.microsoft.com

we have exchange 2003 and for some reason when external recipients send emails to users it gets bounced back as NDR error 5.1.3.

community.spiceworks.com

To add clarity to this, user1 (sender) sending mail to user2 (recipient) results in the mail

www.tek-tips.com

Delivery to the following recipients failed.

practical365.com

How to avoid creating an infinite email routing loop in Exchange Server

support.imodules.com

accepted” or “SMTP Error: The following recipients failed”.

askleo.com

Delivery to the following recipients has been delayed. The strange thing is

serverfault.com

Delivery to the following recipients failed. twhitley@caramail.com

docs.microsoft.com

Can't send an email message when Full Access permission is

thebackroomtech.com

Delivery to the following recipients has been delayed. user@domain.com

www.techrepublic.com

Delivery to the following recipients has been delayed HELP. By Tash · 13