Hello,<BR><BR>I&#039;m running NT Server 4. SMTP is set up to handle mail, any NDR (non delivery reports) are sent to the client&#039;s address so they can investigate (using option set in IIS). However, there are some mails in Badmail that do not have associated NRD&#039;s sent to the client. All these mails have malformed addresses, eg .xxx.co.uk, or xxx.@www.co.uk or xxx@xxx.co.uk&#062; <BR>Surely when SMTP puts them in badmail I thought it would automatically send a NDR at the same time? <BR>Can anyone explain this? Our client is grumpy because they&#039;re not getting all the NDR&#039;s<BR><BR>Thanks!<BR><BR>Thanks