How to whitelist sender email address in exchange 2010?

This is using MS Exchange 2010 server, with antispam installed. My management wants me to whitelist mails sent from a organisation with multiple child domains. For example, *@etp3001.etp.ap.abc.net, *@etp4009.etp.ap.abc.net, etc; in short, I need to whitelist mails sent from *@*.ap.abc.net, how to do it in exchange? through power shell?

Thanks in advance.
MezzutOzilAsked:
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MezzutOzilAuthor Commented:
- $list=(get-contentfilterconfig).Bypassedsenderdomains
      - $list.add("*.ap.blackberry.net")
      - $list.add("*.etp.ap.blackberry.net")
      - set-contentfilterconfig -bypassedsenderdomains $list

      (OPTIONAL)
      - $list=(get-contentfilterconfig).Bypassedsenders
      - $list.add("*@ap.blackberry.net")
      - $list.add("*@etp.ap.blackberry.net")
      - set-contentfilterconfig -bypassedsenders $list

      (VERIFY)
      - get-contentfilterconfig

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MezzutOzilAuthor Commented:
This is more official...
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