I am not able to attach files using mailto: command. I am using mailto: so*******@​something.com?Subject=test...=c:\tes t.txt i have tried all variations of path .... Apr 11, 2003 — Hi. How can I add a attachment with shellexecute() and mailto. I have tryed this but the attachment doesnt work. var messg : string; begin. mailto is a Uniform Resource Identifier (URI) scheme for email addresses. It is used to produce hyperlinks on websites that allow users to send an email to aÂ