конфиг sendmail
[code]
sendmail]
smtp_server=smtp.mail.ru
smtp_port=25
smtp_ssl=auto
default_domain=mail.ru
error_logfile=error.log
debug_logfile=debug.log
auth_username=osipovnet@mail.ru
auth_password=Lcferusdim
pop3_server=pop.mail.ru
pop3_username=osipovnet@mail.ruu
pop3_password=Lcferusdim
force_sender=osipovnet@mail.ru
force_recipient=
hostname=mail.ru[/code]

php.ini

[mail function]
;For Win32 only.
SMTP =
sendmail_from = 
sendmail_path = “C:\wamp\sendmail\sendmail.exe -t”

проверял скриптом

<?php
 
      $addr = $_POST['addr'];

      $theme = $_POST['theme'];

      $text = $_POST['text'];

      if (isset($addr) && isset($theme) && isset($text)

              && $addr != "" && $theme != "" && $text != "") {

          if (mail($addr, $theme, $text, "From:osipovnet@mail.ru")) {

              echo "<h3>Сообщение отправлено</h3>";

          }

          else {

              echo "<h3>При отправке сообщения возникла ошибка</h3>";

          }

      }

      ?>