會用asp寄信的能否幫我看一下, 哪裡出錯

[yumingwu]

寄信人帳號:aaa, 收信人帳號:bbb
寄信人aaa寄信都沒問題
收信人用hinet的帳號也沒問題
但是收信人用maild的帳號卻不能收, 網頁會出現錯誤碼500的內部伺服器發生錯誤
請問一下, 這是語法的問題, 還是maild設定的問題, 應該如何解決呢?
麻煩知道的請解答一下, 謝嘍
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Set JMail=Server.CreateObject("JMail.SMTPMail")
Jmail.maildomain = "mydomain.com.tw"
JMail.ContentTransferEncoding = "8bit"
JMail.ISOEncodeHeaders = False
JMail.Charset = "big5"
JMail.ContentType = "text/html"
JMail.Encoding = "base64"
JMail.MimeVersion = "1.0"
JMail.SenderName = myname
JMAIL.Sender = "aaa@mydomain.com.tw"
JMail.Subject = title
JMail.Body = content

JMail.AddRecipient ("bbb@mydomain.com.tw")

JMail.Priority=2
JMail.Execute

set JMail=nothing