我正在创建一个电子邮件表单，并发送了以下测试消息：
test
test test
但是，我收到了以下电子邮件，其中包含代表新行的标签和字符实体：
<p>test</p>
<p> </p>
<p> </p>
<p> </p>
<p>test test</p>
这是处理邮件的PHP代码：
var $useragent = "CodeIgniter";
var $mailpath = "/usr/sbin/sendmail"; // Sendmail path
var $protocol = "mail"; // mail/sendmail/smtp
var $smtp_host = ""; // SMTP Server. Example: mail.earthlink.net
var $smtp_user = ""; // SMTP Username
var $smtp_pass = ""; // SMTP Password
var $smtp_port = "25"; // SMTP Port
var $smtp_timeout = 5; // SMTP Timeout in seconds
var $wordwrap = TRUE; // TRUE/FALSE Turns word-wrap on/off
var $wrapchars = "76"; // Number of characters to wrap at.
var $mailtype = "text"; // text/html Defines email formatting
var $charset = "utf-8"; // Default char set: iso-8859-1 or us-ascii
var $multipart = "mixed"; // "mixed" (in the body) or "related" (separate)
var $alt_message = ''; // Alternative message for HTML emails
var $validate = FALSE; // TRUE/FALSE. Enables email validation
var $priority = "3"; // Default priority (1 - 5)
var $newline = "\n"; // Default newline. "\r\n" or "\n" (Use "\r\n" to comply with RFC 822)
var $crlf = "\n";