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[cobalt-users] Do I have to worry?



I'm sorry if this is of topic, but I found a lot of these lines in my
maillog on my Raq4:

Jun 15 20:26:18 www sendmail[4500]: f5FIOr904500: ruleset=check_mail,
arg1=<firstmate@xxxxxxxxxxx>, relay=teleglobe.net [216.6.14.155] (may be
forged), reject=451 4.1.8 <firstmate@xxxxxxxxxxx>... Domain of sender
address firstmate@xxxxxxxxxxx does not resolve

Is somebody trying to use my raq for spam or what? How can I stop these
messages?

TIA,

Jeff