PHP mail() function 返回 1 但尽管配置了 XAMPP 但没有发送邮件

Question

In a PHP application during the sign up step, I'm sending an email with a verfication link to the user. I'm using XAMPP in localhost to serve the page, and my database is in another device but in the same network. When I fill the form and hit the sign up button, I get a success message, the database is updated but no email is received to my address. I've searched for answers and found out that I had to configure php.ini and sendmail.ini properly in order for it work and I did that as well but still no mail is send. Can anyone explain why is this happening? Below are the configurations of both php.ini and sendmail.ini as there is no problem with my signup.php since the database is updating.

sendmail.ini

[sendmail]
smtp_server= smtp.mail.yahoo.com

smtp_port=465

smtp_ssl=ssl

;default_domain=mydomain.com

error_logfile=error.log

;debug_logfile=debug.log

auth_username=mymail@yahoo.com

auth_password=mypassword

pop3_server=

pop3_username=

pop3_password=

force_sender=mymail@yahoo.com

force_recipient=

hostname=

php.ini

[mail function]
SMTP= smtp.mail.yahoo.com

smtp_port=465

sendmail_from = mymail@yahoo.com

sendmail_path = "\"C:\Users\GMKRG\Desktop\xampp\sendmail\sendmail.exe" -t"

;mail.force_extra_parameters =

mail.add_x_header=Off

mail.log = "\"C:\Users\GMKRG\Desktop\xampp\sendmail\error.txt"

;mail.log = syslog

I've also configured my yahoo account to accept mails from less secure apps but still no mail received. Thanks in advance.

EDIT: Below is the php mail function in case it helps more.

$email = mysqli_real_escape_string($connection, $mailString);
$emailBody = "Please click on the link below to activate your account:\n\n";

$emailBody .= "localhost/website/activate.php?email=" . urlencode($email) . "&key=$activationKey";

if(mail($email, 'Confirm your registration', $emailBody, 'From:'.'myaddress@yahoo.com')){

    echo "<div class='alert alert-success'>Thank you for registering. A 
           confirmation email has been sent to $email. Please click on the 
           activation link inside it to activate your account.</div>";
}

Answer 1

It seems that yahoo smtp sever is not working properly with xampp. Once I switched to gmail everything worked.