Email has a taste of personality, so when viewing your domain, we try to fetch your favicon and show it on our site. We do that by fetching HTML source code of the site and find favicon tag.
But apparently it has so many edge cases. Example, a few domain only server http, not https. or only has a valid site on
www. but not on bare domain.
Some sites don't event have any favicon tag, just rely on the default domain.com/favicon.ico.
hanami finall ironed this out and show you a nice favicon. Check it out and let us know how you think