The documentation set for this product strives to use bias-free language. For the purposes of this documentation set, bias-free is defined as language that does not imply discrimination based on age, disability, gender, racial identity, ethnic identity, sexual orientation, socioeconomic status, and intersectionality. Exceptions may be present in the documentation due to language that is hardcoded in the user interfaces of the product software, language used based on RFP documentation, or language that is used by a referenced third-party product. Learn more about how Cisco is using Inclusive Language.
Environment: Cisco Email Security Appliance (ESA), all versions of AsyncOS
AsyncOS has no settings to priorize delivery for single domains, because every recipient domain gets a separate connection, where it will be delivered instantly. Also, all incoming messages are treated with the same priority. However you have the option of whitelisting any number of addresses that you trust and allow messages form these domains to skip anti-spam and/or anti-virus scanning.