<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <meta content="text/html;charset=ISO-8859-1" http-equiv="Content-Type"> </head> <body bgcolor="#ffffff" text="#000000"> <a class="moz-txt-link-abbreviated" href="mailto:admin@lctn.org">admin@lctn.org</a> wrote: <blockquote cite="mid2593.64.8.148.4.1171644044.squirrel@lctn.org" type="cite"> <blockquote type="cite"> <pre wrap="">The trick is to (while logged in or "su'd" to the Nagios user) manually type out a command and keep adjusting until it works - then put that into Nagios. e.g. echo "Test e-mail"|/usr/sbin/sendmail -s "Host DOWN" <a class="moz-txt-link-abbreviated" href="mailto:admin@domain.com">admin@domain.com</a> </pre> </blockquote> <pre wrap=""> OK, now we're getting somewhere..... Here is the error I get under the nagios user: WARNING: RunAsUser for MSP ignored, check group ids (egid=1001, want=120) can not chdir(/var/spool/mqueue-client/): Permission denied Program mode requires special privileges, e.g., root or TrustedUser. What is the best way to resolve this without causing a security problem? </pre> </blockquote> This is within your MTA - you'll have to read up (in sendmail's documentation) on how to set your nagios shell user as a trusted user within sendmail - this tells sendmail the users that are allowed to use it in "program-mode" (i.e. local submission, not over an SMTP connection.) Either that, or you need a script/plugin that will receive your text and send the mail via SMTP instead of local submission. Somebody familiar with sendmail may be able to help, I'm afraid I'm not. Andy. </body> </html>