Proxy address can be hostname?

Hi,

My question is when I define a source like this

[source."ip-1"]
ehlo_domain = 'mta1.examplecorp.com'
ha_proxy_server = '10.156.0.2:6000'
ha_proxy_source_address = '55.55.55.55'

Can I use ex. my-proxy-1.internal in the config instead of the IP address if it resolves in the KumoMTA server environment?

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No, it must be a SocketAddr, either an ipv4 or ipv6 address