How To Create Email Avatar

Hi there, newbie here

Been trying to find how to add an email avatar to my self-hosted emails.

A push in the right direction would really be appreciated.

Thanks

Email avatar mean?

Its the little circle picture / image that is next to the senders name when you get an email…

See here - How to Add Email Avatar for Different Mailbox Providers | Blog Selzy

Example -

I am having the same questions. I will let you know if I find anything