helo_name=someorg.org
queue_id=8045F2AB23
sender=dailyreckoning@electricmessage.co.uk
recipient=dario@gn.apc.org
client_address=192.168.0.254
client_name=another.domain.tld
message_origin=another.domain.tld[1.2.3.4]

helo_name=smtp.yahoo.com
queue_id=8045F2AB24
sender=someuser@yahoo.com
recipient=someuser@mydomain.org
client_address=216.145.54.171
client_name=smtp.yahoo.com