IIS and SMTP - Can't send mail to some domains

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Can't send mail to some domains

Ilai

2004-01-24, 2:03 am

Hi there, strange issue - we have a w2k inviroment.
exchange 2000. some domains are sending us mail and they
get NDRs. we havn't enabled the "use reverse DNS" check
box on system manager, they are not on any black list and
we still cant get mail from them. thier ISP suggessted
setting up a reverse DNS -why? will it work? please
advise.thx...