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who to force the reverse lookup of the sender's DNS ?

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haneo

haneo

Programmer
Jan 2, 2002
274
CA
I hvae installed a redhat7.1 as SMTP server with sendmail; every body now can send mail like this:

From : sender@bogusDNS.bogus

the sendmail is accepting the mail for the delievery with the bogus address @bogusDNS.bogus !!!!

yesterday i have installed slackware 7.1 with sendmail as SMTP server and .....guess... it does not accepte this bogus DNS :)) .
but what i must change in the redhat's sendmail.cf to force sendmail to make a reverse lookup for the DNS of the sender ??

thanks in advance ;-)
 
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