[問題] JAVA SMTP Client問題

[lineage90160 ()]

用一個SMTP Client發信

我在家run可以 (MailServer:ms29.hinet.net)

正確發送的訊息:

DEBUG: setDebug: JavaMail version 1.4.1
DEBUG: getProvider() returning
javax.mail.Provider[TRANSPORT,smtp,com.sun.mail.smtp.SMTPTransport,Sun
Microsystems, Inc]
DEBUG SMTP: useEhlo true, useAuth false
DEBUG SMTP: trying to connect to host "ms29.hinet.net", port 25, isSSL false
220 msr39.hinet.net ESMTP Sendmail V8; Wed, 24 Dec 2008 15:32:41 +0800 (CST)
DEBUG SMTP: connected to host "ms29.hinet.net", port: 25

EHLO mychat-aa10fe15
250-msr39.hinet.net Hello 118-169-203-247.dynamic.hinet.net
[118.169.203.247], pleased to meet you
250-8BITMIME
250-SIZE
250-DSN
250-ONEX
250-XUSR
250 HELP
DEBUG SMTP: Found extension "8BITMIME", arg ""
DEBUG SMTP: Found extension "SIZE", arg ""
DEBUG SMTP: Found extension "DSN", arg ""
DEBUG SMTP: Found extension "ONEX", arg ""
DEBUG SMTP: Found extension "XUSR", arg ""
DEBUG SMTP: Found extension "HELP", arg ""
DEBUG SMTP: use8bit false
MAIL FROM:<[e-mail]>
250 <[e-mail]>... Sender ok
RCPT TO:<[e-mail]>
250 <[e-mail]>... Recipient ok
DEBUG SMTP: Verified Addresses
DEBUG SMTP:   [e-mail]
DATA
354 Enter mail, end with "." on a line by itself
From: [e-mail]
To: [e-mail]
Message-ID: <2989062.1.1230103960000.JavaMail.Administrator@mychat-aa10fe15>
Subject: test
MIME-Version: 1.0
Content-Type: multipart/mixed;
        boundary="----=_Part_0_19859865.1230103959953"

------=_Part_0_19859865.1230103959953
Content-Type: text/html;charset=big5
Content-Transfer-Encoding: 7bit

test
------=_Part_0_19859865.1230103959953--
.
250 PAA21781 Message accepted for delivery
QUIT
221 msr39.hinet.net closing connection


但是到學校交作業時

出現

DEBUG: getProvider() returning
javax.mail.Provider[TRANSPORT,smtp,com.sun.mail.smtp.SMTPTransport,Sun
Microsystems, Inc]
DEBUG SMTP: useEhlo true, useAuth false
DEBUG SMTP: trying to connect to host "ms29.hinet.net", port 25, isSSL
false

請問是什麼原因?

是port被佔用了嗎?

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※ 發信站: 批踢踢實業坊(ptt.cc) 
◆ From: 118.169.203.247
推 darkcc:hinet的smtp不收從學網來的信
→ lineage90160:但我是用hinet的SMTP寄信給yahoo信箱
→ lineage90160:                   ^server
推 tristeyang:想透過hinet 發，IP必須是hinet的IP..
→ lineage90160:所以用學網發信 server跟from都要用校內smtp嚕?