Include "@" before the domain name to make the filter specific - for example, to whitelist all mail from the sumo.com domain, but not mail that might come from one of its subdomains (such as @subdomain.sumo.com), type "@sumo.com" into the field.
Gụnye ampersand " @ " n'ihu aha ngalaba ahụ iji mee ntụgharị kpọmkwem-dịka ọmụmaatụ, ka whitelist niile mail site na example.com ngalaba, ma ọ bụghị mail nke nwere ike si na otu nke ya subdomains (dị ka @ subdomain.example.com), pịnye "@ example.com" n'ọhịa.