Send an attached picture about the message body

Hello everyone,
I have converted an image to Base64. How do I attach this image to the main text when sending SMTP?
I want to take a look at the body of the email about how html is written.

Hi @shenyu ,
in property, select “is body html”

in body as html front

in attrath file

see more detail, they are similar

Have a view on this on how to send embedded image - base64 along mail body

Cheers @shenyu