Received: from localhost (localhost [2001:db8:114::514])
 by ietfa.amsl.com (Postfix) with ESMTP id 00E7712024B
 for <cfrg@ietfa.amsl.com>; Tue,  7 May 2019 14:01:07 -0700 (PDT)
Received: from mail.example.org ([198.51.100.233])
 by lame.example.net (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024)
 with ESMTP id k8UsBTUjeiTe for <cfrg@ietfa.amsl.com>;
 Tue,  7 May 2019 14:01:04 -0700 (PDT)
Received: from foobar.example.org ([4.31.198.44])
 by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024)
 with ESMTP id k8UsBTUjeiTe for <cfrg@ietfa.amsl.com>;
 Tue,  7 May 2019 14:01:04 -0700 (PDT)
Received: from mail.example.org ([198.51.100.2])
 by foobar.example.org (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024)
 with ESMTP id k8UsBTUjeiTe for <cfrg@ietfa.amsl.com>;
 Tue,  7 May 2019 14:01:04 -0700 (PDT)

haha