┌considering: -oMa sender_host_address = $sender_host_address
├──expanding: -oMa sender_host_address = $sender_host_address
└─────result: -oMa sender_host_address = V4NET.0.0.1
┌considering: -oMa sender_host_address = $sender_host_address
├──expanding: -oMa sender_host_address = $sender_host_address
└─────result: -oMa sender_host_address = V4NET.0.0.1