SRS_EXCLUDE_DOMAINS only works with comma-delimited

From postsrsd conf:

# Exclude additional domains.
# You may list domains which shall not be subjected to address rewriting.
# If a domain name starts with a dot, it matches all subdomains, but not
# the domain itself. Separate multiple domains by space or comma.
#
#SRS_EXCLUDE_DOMAINS=.example.com,example.org

But in my testing a space-delimited list did not actually work.