problem in add picture profile in mail server

Hello friends. I set up a mail server with Postfix and Dovecot and i dont have any webclient email (like squirremail and ...). I have a website where I enter my email information in email settings section, (the smtp address, username and password and ...) I want to add a photo to my email account (for example : info@mysite.com) so that when the email is sent the profile picture will be displayed. Like the email of your site. please check the attechment photo.

please help me.
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