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Special Forums Cybersecurity recieving undeliverable reciepts of spam mails that seem to be coming from my domain Post 302264927 by otheus on Friday 5th of December 2008 06:57:03 AM
Old 12-05-2008
You might not need to worry. These messages might be simple forgeries using a From address that has your domain in it. Check to see if the messages are actually being SENT from your server. Then you have to worry.
 

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qmail(7)						 Miscellaneous Information Manual						  qmail(7)

NAME
qmail - overview of qmail documentation INTRODUCTION
qmail is a secure, reliable, efficient, simple message transfer agent. Users who want to control incoming messages should read dot-qmail(5). Available commands for the .qmail file include qbiff(1), qre- ceipt(1), forward(1), bouncesaying(1), and condredirect(1). Other helpful commands include maildirmake(1), maildir2mbox(1), and maildirwatch(1). System administrators who want to control the entire qmail system should start with qmail-control(5) and qmail-start(8). There are three queue-monitoring tools: qmail-qread(8), qmail-qstat(8), and qmail-tcpto(8). Incoming SMTP connections are handled by qmail-smtpd(8). qmail offers two command-line message-sending interfaces: qmail-inject(8) and mailsubj(1). For background information on Internet mail messages, see addresses(5), envelopes(5), qmail-header(5), and forgeries(7). Miscellaneous documentation includes qmail-limits(7) and qmail-pop3d(8). This documentation describes netqmail version 1.05 of qmail. See http://pobox.com/~djb/qmail.html for other qmail-related software, and http://qmail.org/ for other qmail community contributions. qmail(7)
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