我的网站的联系页面上有联系表格。提交表单后，我收到了成功消息，但我的电子邮件 ID 上收到了两封类似的电子邮件，而不是一封。请帮忙。
以下是我在联系我们表单中的 HTML 代码
<form name="frm" id="frm" method="POST" action="mail.php">
<div class="row">
<div class="span04">
<h5>Send Us Message</h5>
<div class="contact margin_1line"><label>Company Name :</label>
<input type="text" name="companyname" id="companyname" style="width:220px; float:right; height:30px;" class="validate[required,custom[alphaspace]] for_obj" /> </div>
<br />
<div class="contact margin_1line"><label>Email ID :</label>
<input type="text" name="email" id="email" style="width:220px; float:right; height:30px;" class="validate[required,custom[email]] for_obj" /> </div>
<br>
<div class="contact margin_1line"><label for="message">Contact Address :</label>
<textarea name="address" id="address" class="validate[required] for_obj" rows="8" cols="10" style="width:220px; float:right;"></textarea> </div>
<br /><br /><br />
<div class="contact" style="float:right;"><label> </label>
<input type="reset" value="reset" class="butt custom_font" style="float:right;" />
<input type="submit" value="Send" class="butt custom_font" style="margin-right:10px; float:right;" />
</div>
</div><!-- /span6 -->
<div class="span04">
<h5> </h5>
<div class="contact margin_1line"><label>Contact Person :</label>
<input type="text" name="contactperson" id="contactperson" style="width:210px; float:right; height:30px;" class="validate[required,custom[alphaspace]] for_obj" /> </div>
<br>
<div class="contact margin_1line"><label>Office No. :</label>
<input type="text" name="phone" id="phone" class="validate[required,custom[universal_contact]] for_obj" style="width:210px; float:right; height:30px;" /> </div>
<br>
<div class="contact margin_1line"><label for="message">Services Interested :</label>
<textarea name="interested" id="interested" class="validate[required] for_obj" rows="8" cols="10" style="width:210px; float:right;"></textarea> </div>
</div><!-- /span6 -->
<div class="span04">
<h5> </h5>
<div class="contact margin_1line"><label>Designation :</label>
<input type="text" name="designation" id="designation" style="width:220px; float:right; height:30px;" class="validate[required,custom[alphaspace]] for_obj" /> </div>
<br>
<div class="contact margin_1line"><label>Mobile :</label>
<input type="text" name="mobile" id="mobile" class="validate[required,custom[universal_contact]] for_obj" style="width:220px; float:right; height:30px;" /> </div>
<br>
<div class="contact margin_1line"><label for="message">Other Remarks :</label>
<textarea name="remarks" id="remarks" class="" rows="8" cols="10" style="width:220px; float:right;"></textarea> </div>
</div><!-- /span6 -->
</div><!-- /row -->
</form>
下面是我在 mail.php 文件中的 PHP 代码
<?php
$companyname = $_POST['companyname'];
$contactperson = $_POST['contactperson'];
$designation = $_POST['designation'];
$email = $_POST['email'];
$phone = $_POST['phone'];
$mobile = $_POST['mobile'];
$address = $_POST['address'];
$interested = $_POST['interested'];
$remarks = $_POST['remarks'];
$formcontent="Company Name: $companyname \n Contact Person: $contactperson \n Designation: $designation \n Phone: $phone \n Mobile: $mobile \n Contact Address: $address \n Services Interested: $interested \n Other Remarks: $remarks";
$recipient = "demomail@abc.com";
$subject = "Enquiry from Website";
$mailheader = "From: $email \r\n";
mail($recipient, $subject, $formcontent, $mailheader) or die("Error!");
echo "Thank You! <br /> We will get in touch with you as soon as possible.";
?>