How to set the sender icon for emails sent via SMTP mailgun?

Question

PHP

We send letters through an external SMTP server MailGun.com. How to set the sender icon for sent emails?

Answer 1

A more or less universal way is to set an icon for the sender's address via Gravatar:
ru.gravatar.com
You can set icons for the domain separately on different services, for example, for mail.ru at https://postmaster.mail.ru/