It will only work for domain names included in /etc/virtual/use_rbl_domains, so be sure to read the documentation for that as well.# 3) Add a file /etc/virtual/whitelist_from
# This file should contain the fully-qualified hostnames or IP#s
# of servers that you DO want to be able to get email from even
# if they're otherwise caught by blocklists. Your own domain
# need not be listed here to enable you to get unblock requests,
# whitelisting of email to your "errors" address will be handled
# separately, below.