Setup SMTP Mail server on xampp (localhost))

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// C:\xampp\php\php.ini
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[mail function]
smtp_port=587
sendmail_from = [email protected]
sendmail_path = "\"C:\xampp\sendmail\sendmail.exe\" -t"

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// C:\xampp\sendmail\sendmail.ini
----------------------------------------------------------------------

smtp_server=smtp.gmail.com
smtp_port=587
error_logfile=error.log
debug_logfile=debug.log
[email protected]
auth_password=your-gmail-password
[email protected]

If it still not send mail then config your gmail account following instruction.
https://support.google.com/accounts/answer/6010255

DONE and restert Apache and enjoy

I haven't used Sendmail in a while, so I'm not sure what's causing the issue, but you could try adding [email protected] in the sendmail.ini file along with SMTP details like:

[email protected]
auth_password=your-gmail-password
[email protected]

2nd Method: If you are using PHP’s mail() function, ensure you're specifying the "From" header in your email. You can read more about mail headers here.

By the way, even if you're using wp_mail(), you also need to pass the "From" header inside the mail headers. There's a WordPress mail hook available to help with that as well.

I did try to add the from details in sendmail.ini and it didn't work, i think it has something to do with the sendmail_path...
when i remove the " either all or one i get successful echo message but of course no message ever sent.
anyway; thanks for the reply; I'll dig little bit deeper because i think it has something to do with my OS.
Thank you.