DNS &Sendmail problem

[DERYA GUNGORMUS (IT-TMO)]

Hi all,
I've a machine which runs Sun Solaris 2.6
I'm using sendmail with DNS support, but i can't send mail from this machine
anymore but if i remove DNS i can send mail !
Strange thing is that i have another machine which has the same conf. with
the other one and i can send mail from it by usin DNS
Does anybody have an idea ?
I didn't change any setting on my machine
Thank you...

derya

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