aboutmyemail
It’s not always easy to know what the actual headers and body of an email as sent look like. For a long time accepted wisdom was that you could send a copy to your gmail account, and use the Show Original menu option to, well, see the original message as raw text. It turns out that’s not actually something you can trust. I used swaks to send a test message with an extra header to my gmail account. swaks –to wttwsteve@gmail.com –from steve@blighty.com –add-header “List-Unsubscribe: =?us-ascii?Q?=3Cmailto=3Asteve=40blighty.com=3e?=” Code language: JavaScript ( javascript ) We can see swaks sending it: -> DATA Date: Wed, 17 Jan 2024 08:49 :59 -0800 -> To: wttwsteve @gmail.com -> From: steve@blighty.com -> Subject: test Wed, 17 Jan 2024 08:49:59 -0800 -> X-Mailer: swaks v20130209.0 jetmore.org/john/code/swaks/ -> List-Unsubscribe: =?us-ascii?Q?=3Cmailto=3Asteve=40blighty.com=3e?= -> Code language: CSS ( css ) But when we then go to gmail and click on Show