use MIME_MAIL()to send *.HTMLwith image?

[Anon]

use attach() function of the MIME_MAIL() class to send mail,I find that it is difficult for *.htm with map (size>2k),it is slowly,then,I cann\'t send my mail,I get \"can\'t find the sever \",Can you tell me why it is? my code as follows:

$content=implode(\"\",file($userfile);
$mime = new MIME_mail(\"www.tonghua.com.cn\",\"[e-mail]\",\"weekly\");
$mime->attach($content, \"\", HTML, BASE64);