Editing Capacity of Email Service (section)

== Email服務每封郵件的檔案大小上限 ==
'''建議''':
* 檔案大小 (file size) 控制在'''6-10MB''': 因為信件夾帶的檔案經過編碼([http://en.wikipedia.org/wiki/MIME MIME] encode)後，會導致檔案大小變大，所以寄信時的信件(含夾帶的檔案)檔案大小建議能控制在上限的三分之二，即6-10MB，以免被退信。
* 超過10MB的檔案，可以考慮使用將附檔[[File compression|壓縮]] 或放在Web、FTP、[http://en.wikipedia.org/wiki/Comparison_of_one-click_hosters 線上檔案儲存網站]、[[Snapchat of file sharing | 閱後即焚檔案分享服務]] ex: [https://drive.google.com/ Google Drive] 單一檔案限 5TB<ref>[https://support.google.com/drive/answer/37603?hl=zh-Hant&vid=1-635756751147519182-13007898089037315163 檔案大小 - 雲端硬碟說明] {{access | date = 2015-08-20}}</ref>, DropBox 單一檔案限2GB<ref>[https://www.dropbox.com/help/5 Dropbox 是否有檔案大小的限制或上限？ (Dropbox 說明中心)]</ref>, [http://www.mediafire.com/ MediaFire](非圖檔的單一檔案限200MB), [http://www.yousendit.com/ YouSendIt](單一檔案限100MB), [http://www.4shared.com/ 4shared.com](單一檔案限50MB)...。

<div style="width:100%; min-height: .01%; overflow-x: auto;">
{| border="1" class="wikitable sortable"
|
|| <b>網站名稱</b>
|| <b>單封信件(含夾帶檔案)的檔案上限</b>
|| <b>建議的夾帶檔案上限</b>
|| <b>信箱總容量上限</b>
|| <b>備註(拜訪日期)</b>
|-
|
|| [http://webmail.aol.com/ AOL Mail](免費)
|| 16MB<ref>[http://help.aol.com/help/microsites/microsite.do?cmd=displayKCPopup&docType=kc&externalId=221717 Cannot send email attachments or embedded files on AOL WebMail- AOL Help]</ref>
|| 10MB
|| 超過2GB，輸入檢核碼即可增加空間<ref>[http://help.aol.com/help/microsites/microsite.do?cmd=displayKCPopup&docType=kc&externalId=218743 How do I save my emails in AOL WebMail?- AOL Help] </ref>
|| 2010-09-11
|-
| {{Gd}}
|| [https://gmail.google.com/ Google Gmail](免費/付費服務)
|| 25MB<ref>[https://mail.google.com/support/bin/answer.py?answer=8770&topic=1516 Maximum attachment size - Gmail Help]  </ref><br /> (超過25MB可上傳至Google Drive，最多到 5TB<ref>[https://support.google.com/drive/answer/37603?hl=zh-Hant Google 雲端硬碟可存放的檔案 - 雲端硬碟說明]</ref> )
|| 15MB
|| 15G(免費服務)/ 100GB-30TB(付費服務)<ref>[http://mail.google.com/support/bin/answer.py?hl=en&answer=39567 Google Storage - Gmail Help] </ref>
|| 2018-04-21
|-
| 
|| [http://www.mail.lycos.com/ Lycos Mail] (免費)
|| 35MB<ref>[https://cshelp.lycos.com/ics/support/KBAnswer.asp?questionID=73 Is there a limit to the size of the emails that I can send? - Lycos.com Helpdesk]</ref>
|| 21MB
|| 3G(free) ~ 5G(paid)
|| 2011-11-06
|-
|
|| [http://www.mail.com/intl/ Mail.com](免費/付費服務)
|| 50MB<ref>[http://help.mail.com/index.html Mail.com FAQ] - What is the maximum size for sending and receiving email? </ref>
|| 30MB
|| '''未限制'''
|| 2011-11-06
|-
|
|| [http://www.mail2000.com.tw/ Mail2000](付費服務)
|| 40MB<ref>[http://doc.mail2000.com.tw/m2k/faq_about_a1-3.htm 單封信件傳輸量及我的檔案的容量有多少？] </ref>
|| 30MB
|| 500MB~12GB
|| 2011-11-06
|-
|
|| [http://mail.pchome.com.tw/ PChome Online](免費)
|| 10MB<ref>[http://faq.pchome.com.tw/faq_solution.html?f_id=1&q_id=6&c_nickname=mail PC home E-Mail 是否有容量等限制？] </ref>
|| 6MB
|| 250MB
|| 2018-04-21
|-
|
|| [http://webmail.seed.net.tw/Login.do Seednet](付費服務)
|| 10MB<ref>[http://webmail.seed.net.tw/web/rule.htm Seednet Webmail使用規範] </ref>
|| 6MB
|| 2G
|| 2011-11-06
|-
|
|| [http://www.url.com.tw/emailstore/index.htm URL智邦生活館](付費服務)
|| 10MB(付費服務]<ref>[http://vipmail.url.com.tw/vipmail.asp?q=1 URL 智邦生活館 VIP Mail 常見問題集] </ref>
|| 6MB(付費服務)
|| 2000MB(付費服務)
|| 2011-11-06
|-
|
|| [https://outlook.com outlook.com](免費) 前 hotmail
|| 34MB<ref>[https://support.office.com/en-us/article/Attach-files-in-Outlook-com-8d7c1ea7-4e5f-44ce-bb6e-c5fcc92ba9ab Attach files in Outlook.com - Outlook]</ref><br /> (超過可上傳至OneDrive，最多到 15GB(免費) ~ 50GB(付費)<ref>[https://support.office.com/en-us/article/storage-limits-in-outlook-com-7ac99134-69e5-4619-ac0b-2d313bba5e9e?ui=en-US&rs=en-US&ad=US Storage limits in Outlook.com - Outlook]</ref>)
|| 20MB+
|| 
|| 2018-08-25
|-
| {{Gd}}
|| [http://mail.yahoo.com.tw/ Yahoo!奇摩電子信箱](免費/付費服務)
|| 25MB(免費/付費服務)<ref>[https://tw.help.yahoo.com/kb/%E4%BF%A1%E4%BB%B6%E5%A4%A7%E5%B0%8F-%E9%99%90%E5%88%B6-sln5673.html 信件大小限制]</ref>
|| 15MB(免費/付費服務)
|| 1TB
|| 2018-04-21
|-
| 
|| [https://protonmail.com/ ProtonMail](免費/付費服務)
|| 25MB<ref>[https://protonmail.com/support/knowledge-base/attaching-multiple-documents-to-a-message/ Attaching documents to a message and limits - ProtonMail Support]</ref>
|| 15MB
|| 500MB(免費服務)、5~20GB(免費/付費服務)<ref>[https://protonmail.com/support/knowledge-base/paid-plans/ ProtonMail Plans Explained (Free, Paid, Visionary) - ProtonMail Support]</ref>
|| 2016-11-12
|-
| 
|| [http://mail.qq.com/ QQ邮箱] 腾讯邮箱服务 (免費服務)
|| 50MB <br /> 超過限制可上傳至雲端硬碟，最多到 2GB <ref>[http://service.mail.qq.com/cgi-bin/help?subtype=1&&id=11&&no=130 一封邮件可以发送多个附件吗？_QQ邮箱帮助中心] & [http://service.mail.qq.com/cgi-bin/help?subtype=1&&id=35&&no=206 什么是文件中转站？_QQ邮箱帮助中心] </ref>
|| 30MB
|| '''未限制'''<ref>[http://service.mail.qq.com/cgi-bin/help?subtype=1&&no=103&&id=22 QQ邮箱的容量和附件有多大？_QQ邮箱帮助中心]</ref>
|| 2018-04-29
|-
|}
</div>

寄信到 hotmail 收到回信「Delivery Status Notification (Failure)」
<pre>
伺服器的回應如下：
552 Too much mail data.(31457280 bytes bounded)
</pre>

訊息中「31457280 bytes」相當於 31 MB。實際信件的附檔檔案大小約 24 MB，因此需要如上表建議調整到 20 MB 或者是直接上傳到雲端硬碟空間。