自动发邮件 使用了这个类http://bbs.php100.com/read-htm-tid-121431.html
因他用的php版本较老，用到了函数ereg_replace() 和 ereg()
解决方法
1ereg_replace() 函数，替换为 strtr() 函数
语法不同点如下：
详情http://www.php.net/manual/zh/function.ereg-replace.php
详情http://www.w3school.com.cn/php/func_string_strtr.asp
2ereg()  函数，替换为 preg_match() 函数
链接http://blog.163.com/yanli_xu/blog/static/1363672912011420101820393/
preg_match() 函数语法http://www.php.net/manual/zh/function.preg-match.php
修改完毕后，完整代码如下
【邮件类】sm.class.php
smtp( = , = 25, = ,, ->debug = ->smtp_port = ->relay_host = ->time_out = 30; ->auth = ; ->user = ->pass = ->host_name = localhost; ->log_file = ->sock = sendmail(, , = , = , , = , = , = = ->get_address(->strip_comment( = (, (^|(\r\n))(\.), \1.\3 .= mime-version:1.0\r\n (==html .= content-type:text/html\r\n .= to: ..\r\n ( != .= cc: ..\r\n .= from: .>\r\n .= subject: ..\r\n .= .= date: .(r).\r\n .= x-mailer:by redhat (php/.().)\r\n (, ) = ( , .= message-id: (ymdhis, )...(*1000000)....>\r\n =