Question

I am using JavaScript mailto function to fill an email body with custom text.

I can add text to the email but the signature doesn’t show up.

Is there any way to send a custom signature with an image using mail-to function?
Or is there any way to insert an HTML image in the body when using the mail-to function?

Sample code:

var message = "text of message";                
var mailLInk = "mailto:[e-mail]?subject=subject&body=" + message;        
document.location.href = mailLink;

Answer 1

Section 2 of RFC 2368 says that the body field is supposed to be in text/plain format, so you can’t do HTML.

However even if you use plain text it’s possible that some modern mail clients would render the resulting link as a clickable link anyway, though.