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I am talking about catching future NDRs. &nbsp;I will check out your link and other milters and get back to this question after some reading.
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I am talking about catching future NDRs.  I will check out your link and other milters and get back to this question after some reading.

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How can I produce a report or send a copy of NDRs to a specific email address? &nbsp;<br />
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I am running OpenBSD v4.3 and Sendmail v8.14.1.
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How can I produce a report or send a copy of NDRs to a specific email address?  

I am running OpenBSD v4.3 and Sendmail v8.14.1.

Monitor NDR's generated by sendmail

Within Internet message handling services (MHS), a message transfer agent or mail transfer agent (MTA) or mail relay is software that transfers electronic mail messages from one computer to another using a client–server application architecture. A MTA implements both the client (sending) and server (receiving) portions of the Simple Mail Transfer Protocol (SMTP). The terms mail server, mail exchanger, and MX host may also refer to a computer performing the MTA function. The Domain Name System (DNS) associates a mail server to a domain with mail exchanger (MX) resource records containing the domain name of a host providing MTA services.

Email Servers

Unix is a multitasking, multi-user computer operating system originally developed in 1969 at Bell Labs. Today, it is a modern OS with many commercial flavors and licensees, including FreeBSD, Hewlett-Packard’s UX, IBM AIX and Apple Mac OS-X. Apart from its command-line interface, most UNIX variations support the standardized X Window System for GUIs, with the exception of the Mac OS, which uses a proprietary system.