assume you are running your own SMTP server and the server received an email with the following lers in it: Return-Path: Delivered-To: aa@cs.fiu.edu Received: from mail.cs. fiu.edu \{[127,0.0.1]] by mail.cs. fiu,edu with LMTP id BOLwK3tP4GPacxQAj2tSdQ (envelope-from ) for ; Sun, 05 Feb 2023 19:53:15 -0500 Date: Mon, 06 Feb 2023 00:53:14 +0000 (UTC) From: TikTok Message-ID: 149.72.157.70 as email server