Problem with rcpthosts

[Md. Sifat Ullah Patwary]

Hi all,
I got a problem with rcpthosts. my domain is abc.spnetctg.com and I put it
in rcpthosts.

#cat rcpthosts
abc.spnetctg.com

Now when I try to send mail to any e-mail address except abc.spnetctg.com
domain qmail reject it. But If there is not rcpthosts it works nice. Here
is my smtproutes:

#cat smtproutes
abc.spnetctg.com:localhost
:mail.spnetctg.com

How can I use rcpthosts and is it necessary to use?

Sifat.