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GAH! sendmail

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http://www.linuxquestions.org – I'm taking over as a Linux admin where they use sendmail last week. I've done very little with email on linux, and haven;'t touched sendmail since 2000 so I am really out of my element. Basically the sendmail server for many months has had performance problems, disk, and load. Looking into it I found this doing a tail on /var/log/Maillog Aug 25 17:11:49 web8 sendmail[1531]: o7OGF2VH002566: to=postmaster, delay=1+01:58:10, xdelay=00:00:00, mailer=relay, pri=2388694, relay=[xx.xx.xx.xx], dsn=4.0.0, stat=Deferred: [10.10.20.107]: No route to host And that was all it was spewing, I edited the (HowTos)