Some users only sendmail to local users

Hello List,

I have a mail server with

sendmail-8.9.3-20
procmail-3.14-2

I would like block some users send email to internet and receive email from
internet, this users only can send mail to local accounts, and I can use
only one domain.

Thanks,

Ricardo Augusto Durão
durao(_at_)pcsolution(_dot_)com(_dot_)br




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