How to ebale htmkl coneten in curl mail

I think you meant to ask "How to embed HTML content in a curl mail?"

To embed HTML content in a curl email, you can use the -H option to specify the Content-Type header as text/html, and then use the -d option to specify the HTML content.

Here's an example:

curl -X POST \
  https://example.com/mail \
  -H 'Content-Type: text/html' \
  -d '<html><body><h1>Hello World!</h1></body></html>'

This will send a POST request to the specified URL with the HTML content <html><body><h1>Hello World!</h1></body></html>.

If you want to send a multipart email with HTML content, you can use the -F option to specify the HTML content as a file.

curl -X POST \
  https://example.com/mail \
  -F 'message=<html><body><h1>Hello World!</h1></body></html>'

This will send a multipart email with the HTML content as a file.

You can also use the --data-binary option to specify the HTML content as a binary file.

curl -X POST \
  https://example.com/mail \
  --data-binary '<html><body><h1>Hello World!</h1></body></html>'

Make sure to replace https://example.com/mail with the actual URL of the mail server or API you are using.

Also, you can use --form option to specify the HTML content as a form data.

curl -X POST \
  https://example.com/mail \
  --form 'message=<html><body><h1>Hello World!</h1></body></html>'

Please note that the above examples are just a demonstration and you should adjust the URL, headers and data according to your specific use case.