請問各位大大，
小弟使用Thunderbird版本3.1.3寄信給所有hotmail的收件者都會被退信，以前都沒問題而最近幾個月卻不行怎麼辦呢??寄給別的mail使用者都很正常唯獨只有hotmail會退信，最後我只能去webmail寄信給使用hotmail的收件者，用webmail寄信給hotmail的收件者就沒問題，很奇怪。
我是用so-net的mail，以下是退信的訊息.....
--------------------------------------------------------------------------------------------------
This is the mail system at host m6.so-net.net.tw.

I'm sorry to have to inform you that your message could not
be delivered to one or more recipients. It's attached below.

For further assistance, please send mail to postmaster.

If you do so, please include this problem report. You can
delete your own text from the attached returned message.

The mail system

<yongyuan-220@hotmail.com>: host mx4.hotmail.com[65.55.37.72] said: 550 SC-001
(COL0-MC1-F46) Unfortunately, messages from 61.64.127.48 weren't sent.
Please contact your Internet service provider since part of their network
is on our block list. You can also refer your provider to
http://mail.live.com/mail/troubleshooting.aspx#errors. (in reply to MAIL
FROM command)



Reporting-MTA: dns; m6.so-net.net.tw
X-SoMail-Queue-ID: 97A27F48241
X-SoMail-Sender: rfc822; nicecase@so-net.net.tw
Arrival-Date: Mon, 28 May 2012 17:42:36 +0800 (CST)

Final-Recipient: rfc822; yongyuan-220@hotmail.com
Original-Recipient: rfc822;yongyuan-220@hotmail.com
Action: failed
Status: 5.0.0
Remote-MTA: dns; mx4.hotmail.com
Diagnostic-Code: smtp; 550 SC-001 (COL0-MC1-F46) Unfortunately, messages from
61.64.127.48 weren't sent. Please contact your Internet service provider
since part of their network is on our block list. You can also refer your
provider to http://mail.live.com/mail/troubleshooting.aspx#errors.
--------------------------------------------------------------------------------------------------
懇請各位大大幫忙，感謝!!

550 SC-001 Hotmail 因原則上的原因拒絕郵件。拒絕的原因可能是內容包含垃圾郵件的特性或 IP/網域聲譽。如果您不是電子郵件/網路管理員，請求助於您的電子郵件/網際網路服務提供者。

messages from 61.64.127.48(m6.so-net.net.tw) weren't sent.
Please contact your Internet service provider since part of their network is on our block list.

So-Net 被 Hotmail 列為黑名單
應該打 So-Net 客服問問

_________________
Firefox 開啟安全模式，停用個人設定、佈景主題及擴充套件(無附加元件)測試：
說明 > 重新啟動但停用附加元件(Firefox 4+)
Firefox Profile: 說明 > 疑難排解資訊 > 開啟資料夾
排版引擎：Firefox(Gecko), Opera(Presto), Google Chrome(WebKit),
Safari(WebKit), Internet Explorer(Trident), Konqueror(KHTML)

大大你好，因為用 Thunderbird寄信會退信所以我就去SO-NET的webmail寄信就OK了，所以我就想說應該不是SO-NET的問題，全部收件者只有寄給Hotmail會被退信...其他都很正常....
還是謝謝大大

問題不解決，我想你用 Outlook 從 So-Net 寄 Hotmail 一樣也會被退信

_________________
Firefox 開啟安全模式，停用個人設定、佈景主題及擴充套件(無附加元件)測試：
說明 > 重新啟動但停用附加元件(Firefox 4+)
Firefox Profile: 說明 > 疑難排解資訊 > 開啟資料夾
排版引擎：Firefox(Gecko), Opera(Presto), Google Chrome(WebKit),
Safari(WebKit), Internet Explorer(Trident), Konqueror(KHTML)

taglife大大你好,我是直接到so-net官網的郵件信箱去寄給hotmail的使用者寄信成功沒問題,但如果用Thunderbird來寄就會寄信失敗被退信,所以才想說是不是Thunderbird的問題

那如果是這樣，合理的推測是使用 WEBmail 時 so-net 用了別台的 smtp

hotmail 近來禁了很多台灣的 ip 又不提供申訴的管道.. ｘ軟的東西真是～唉