当你在Thunderbird中添加一个电邮地址时,你可以选择 ''IMAP (remote folders)'' 和 ''POP3 (将电子邮件保存在你电脑的文件夹里)''. IMAP 和 POP3是两种连接至你的电子邮箱的方法 (经常被称为协议)。 * '''IMAP:''' 讯息和文件都保存在Thunderbird的服务器上。 在Thunderbird中所做的更改将在服务器进行并将在服务器上所做的更改反映在Thunderbird上。 * '''POP3:''' 在服务器上接受收到的邮件（收件箱）将会被Thunderbird下载并储存在你的电脑中，在这之后，Thunderbird将迅速将服务器中的邮件移除。 '''我们建议用户们使用IMAP协议。''' __TOC__ = 你有什么顾虑 = 为了帮助你决定，这里有一些值得顾虑的事情: * '''你是否需要从多过一台设备中登录邮箱账号？''' 选择 IMAP. * '''你是否需要从一个浏览器？中登录邮箱账号''' 选择 IMAP. * '''你的电邮提供商是否支持IMAP和POP3协议？''' 大多数电邮提供商都支持IMAP和POP3,但你应该先进行查询。 * '''What is the size limit of your mailbox?''' Most mail providers provide more than enough space to keep everything on the server, but if you plan on storing more than 15GB, choose POP3. * '''Are you typically on a high latency or extremely high cost connection (such as satellite), or rarely have an internet connection?''' Choose POP3. = What is IMAP and POP3? = == IMAP == IMAP stands for '''I'''nternet '''M'''ail '''A'''ccess '''P'''rotocol, which is more modern than POP3. It is a two-way protocol that copies your email from a remote server to Thunderbird, while preserving the original copy of the mail on the remote server. Changes to these email messages, such as marking them as read, adding or removing labels or tags, or moving them to a different folder, will be replicated on the remote server. Emails that have been downloaded to Thunderbird from the remote server are available for use in Thunderbird when there is no internet connection. Changes made in Thunderbird while there is no internet connection will be synchronized with the remote server when Thunderbird reconnects to the internet. Changes made in Thunderbird are replicated to all imap connected devices. To protect against dataloss, and perhaps also for legal reasons, you should frequently [[Profiles - Where Thunderbird stores your messages and other user data|back up your Thunderbird profile]], even though your mail is stored on a remote server. == POP3 == POP3 stands for '''P'''ost '''O'''ffice '''P'''rotocol (version '''3'''). It is a one-way protocol that downloads your email from a remote server to Thunderbird and deletes the email from the remote server (after 7 days by default in Thunderbird). Changes to these email messages in Thunderbird, such as marking them as read or moving them to a different folder, are not replicated on the remote server, and are only applied to your local computer running Thunderbird. To protect against dataloss, and perhaps also for legal reasons, you should frequently [[Profiles - Where Thunderbird stores your messages and other user data|back up your Thunderbird profile]], especially because your mail is '''not''' stored on a remote server. = Changing your account = Thunderbird does not currently offer a way to convert your existing IMAP account to POP3 or vice versa. In order to change your account to a different protocol, you will need to add the account onto Thunderbird again. See [[Automatic Account Configuration]] to add a new mail account automatically or [[Manual Account Configuration]] to manually configure a new mail account.

当你在Thunderbird中添加一个电邮地址时,你可以选择 IMAP (remote folders) 和 POP3 (将电子邮件保存在你电脑的文件夹里). IMAP 和 POP3是两种连接至你的电子邮箱的方法 (经常被称为协议)。

• IMAP: 讯息和文件都保存在Thunderbird的服务器上。 在Thunderbird中所做的更改将在服务器进行并将在服务器上所做的更改反映在Thunderbird上。
• POP3: 在服务器上接受收到的邮件（收件箱）将会被Thunderbird下载并储存在你的电脑中，在这之后，Thunderbird将迅速将服务器中的邮件移除。

我们建议用户们使用IMAP协议。

你有什么顾虑

为了帮助你决定，这里有一些值得顾虑的事情:

• 你是否需要从多过一台设备中登录邮箱账号？ 选择 IMAP.
• 你是否需要从一个浏览器？中登录邮箱账号 选择 IMAP.
• 你的电邮提供商是否支持IMAP和POP3协议？ 大多数电邮提供商都支持IMAP和POP3,但你应该先进行查询。
• What is the size limit of your mailbox? Most mail providers provide more than enough space to keep everything on the server, but if you plan on storing more than 15GB, choose POP3.
• Are you typically on a high latency or extremely high cost connection (such as satellite), or rarely have an internet connection? Choose POP3.

What is IMAP and POP3?

IMAP

IMAP stands for Internet Mail Access Protocol, which is more modern than POP3. It is a two-way protocol that copies your email from a remote server to Thunderbird, while preserving the original copy of the mail on the remote server. Changes to these email messages, such as marking them as read, adding or removing labels or tags, or moving them to a different folder, will be replicated on the remote server.

Emails that have been downloaded to Thunderbird from the remote server are available for use in Thunderbird when there is no internet connection. Changes made in Thunderbird while there is no internet connection will be synchronized with the remote server when Thunderbird reconnects to the internet.

Changes made in Thunderbird are replicated to all imap connected devices.

To protect against dataloss, and perhaps also for legal reasons, you should frequently back up your Thunderbird profile, even though your mail is stored on a remote server.

POP3

POP3 stands for Post Office Protocol (version 3). It is a one-way protocol that downloads your email from a remote server to Thunderbird and deletes the email from the remote server (after 7 days by default in Thunderbird). Changes to these email messages in Thunderbird, such as marking them as read or moving them to a different folder, are not replicated on the remote server, and are only applied to your local computer running Thunderbird.

To protect against dataloss, and perhaps also for legal reasons, you should frequently back up your Thunderbird profile, especially because your mail is not stored on a remote server.

Changing your account

Thunderbird does not currently offer a way to convert your existing IMAP account to POP3 or vice versa. In order to change your account to a different protocol, you will need to add the account onto Thunderbird again.

See 自动账户配置 to add a new mail account automatically or 手动帐号配置 to manually configure a new mail account.