我用php的mail發信時
	我用php的mail發信時，老是給root一封信： Content-Type: message/delivery-status Reporting-MTA: dns; biz Arrival-Date: Tue, 12 Jun 2001 11:18:09 +0800 Final-Recipient: RFC822; net.fan@263.net Action: delayed Status: 4.2.0 Diagnostic-Code: SMTP; 450 : Sender address rejected: Domain not found 世間的事，我什麼都不懂