Email from a few machines in networksolutions email service are currently blacklistsed on SORBS. I want to whitelist all email originating from *.networksolutionsemail.com, thus bypassing the SORBS blacklist block.

How would I do this?

I have already tried to:

~zimbra/conf edited the file amavisd.conf.in
entering ....
'networksolutionsemail.com' => -3.0,

saving and then runnning...
zmamavisdctl stop && zmamavisdctl start

However, this did not work.

Please advise.