Dalam tutorial ini saya terapkan dengan Xampp 1.7.7 di sistem Windows XP dengan menggunakan SMTP dari free Hosting cPanel, selain cPanel mungkin sama kali yaa intinya.

• 1. Login ke cPanel Hosting.
• 2. Klik "Email Accounts" dan buat akun kalo belom punya.
• 3. Klik tab dropdown "More" disebelah akun email lalu klik "Configure Email Client".
  
  
  
• 4. Lihat bagian bawah sesi "Manual Setting".
  
  
  
  
  Keterangan Setting :
  Mail Server Username = Akun Username
  Incoming Mail Server = Server POP3,POP3S,IMAP,IMAPS
  Outgoing Mail Server = Server SMTP,SMTPS
  Port POP3,POP3S,IMAP,IMAPS = Default
  Port SMTP,SMTPS = Lihat di sampingnya
  
• 5. Masuk Ke Folder Xampp dan Edit "php.ini" pada folder PHP anda, lalu ganti bagian warna merah seperti ini:
  
  

  [mail function]
  ; For Win32 only.
  ; http://php.net/smtp
  SMTP = [SMTP server anda]
  ; http://php.net/smtp-port
  smtp_port = 26
  
  ; For Win32 only.
  ; http://php.net/sendmail-from
  sendmail_from = [Akun email anda]
  
  ; For Unix only.  You may supply arguments as well (default: "sendmail -t -i").
  ; http://php.net/sendmail-path
  sendmail_path = "\"D:\webapp\sendmail\sendmail.exe\" -t"
  

  
  Lalu edit "sendmail.ini" pada folder "sendmail" dan ganti seperti ini:
  
  

  ; configuration for fake sendmail
  
  ; if this file doesn't exist, sendmail.exe will look for the settings in
  ; the registry, under HKLM\Software\Sendmail
  
  [sendmail]
  
  ; you must change mail.mydomain.com to your smtp server,
  ; or to IIS's "pickup" directory.  (generally C:\Inetpub\mailroot\Pickup)
  ; emails delivered via IIS's pickup directory cause sendmail to
  ; run quicker, but you won't get error messages back to the calling
  ; application.
  
  smtp_server=[SMTP server anda]
  
  ; smtp port (normally 25)
  
  smtp_port=26
  
  ; the default domain for this server will be read from the registry
  ; this will be appended to email addresses when one isn't provided
  ; if you want to override the value in the registry, uncomment and modify
  
  ;default_domain=local
  
  ; log smtp errors to error.log (defaults to same directory as sendmail.exe)
  ; uncomment to enable logging
  
  ;error_logfile=error.log
  
  ; create debug log as debug.log (defaults to same directory as sendmail.exe)
  ; uncomment to enable debugging
  
  ;debug_logfile=debug.log
  
  ; if your smtp server requires authentication, modify the following two lines
  
  auth_username=[Akun email anda]
  auth_password=[Password Akun email anda]
  
  ; if your smtp server uses pop3 before smtp authentication, modify the 
  ; following three lines
  
  pop3_server=[SMTP server anda]
  pop3_username=[Akun email anda]
  pop3_password=[Password Akun email anda]
  
  ; to force the sender to always be the following email address, uncomment and
  ; populate with a valid email address.  this will only affect the "MAIL FROM"
  ; command, it won't modify the "From: " header of the message content
  
  force_sender=[Email Si Pengirim silahkan pake Noreply@domain.anda atau terserah anda]
  
  ; sendmail will use your hostname and your default_domain in the ehlo/helo
  ; smtp greeting.  you can manually set the ehlo/helo name if required
  
  ;hostname=localhost
  

• 6. Restart Apache melalui Xampp Control Panel.
• 7. Buat PHP file dengan nama terserah anda & kode berikut ini:
  
  Klik Untuk Melihat
  
• 8. Terakhir Silahkan Dicoba Email Form tersebut.