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叠信 · Lettide 0.5.2
Lettide 0.5.2 · 叠信
English
Downloads
| Platform and package | English “Lettide” | 简体中文「叠信」 |
|---|---|---|
| Windows 10 / 11 · x64 | Download exe | 下载 exe |
| macOS 13+ · Apple Silicon + Intel | Download dmg | 下载 dmg |
What's new
-
Keep draft-operation errors in the selected interface language.
-
Add deletion from local draft rows, context menus and the editor, plus confirmed clearing for the selected account and search scope.
-
Move deleted drafts to recoverable Trash, preserve saved content, attachments and send receipts, and keep in-flight sends and drafts added after confirmation.
-
Add keyboard deletion, English labels, retryable errors and confirmation dialogs that preserve unsaved edits when cancelled.
Install and connect
- Windows: download and run the EXE installer.
- Mac: open the DMG and drag Lettide into Applications.
Node.js is included. Chinese downloads use 叠信; English downloads use Lettide. Change the interface language in Settings.
Google and Microsoft require an OAuth app for the first connection; QQ Mail requires an app password. Account setup. Click Translation or Side by side for free online translation without a model download or API key. Only the email body you select is sent to Google; your original and cached translation stay encrypted on this device. The free service may temporarily limit requests.
These installers are unsigned previews. The Mac app is not notarized.
简体中文
下载安装
| 系统与安装包 | 简体中文「叠信」 | English “Lettide” |
|---|---|---|
| Windows 10 / 11 · 64 位 | 下载 exe | Download exe |
| macOS 13+ · Apple 芯片与 Intel | 下载 dmg | Download dmg |
本次更新
-
修复草稿操作错误提示与界面语言不一致的问题。
-
补齐本机草稿的列表、右键和编辑窗口删除，以及按当前邮箱与搜索范围确认清空的入口。
-
删除后移入可恢复的已删除列表，保留已保存正文、附件和发送回执；正在发送、确认后新建的草稿不被清空。
-
增加键盘删除、中英文提示和失败重试；取消删除确认不会关闭编辑窗口或丢失未保存修改。
安装与连接
- **Windows：**下载并双击 EXE 安装程序。
- **Mac：**打开 DMG，把叠信拖入「应用程序」。
内置 Node.js，无需另装运行环境。中文下载显示「叠信」，英文下载显示「Lettide」，界面语言可在设置中切换。
Google 和 Microsoft 首次连接需要 OAuth 应用，QQ 邮箱需要授权码。邮箱接入。点击「译文」或「对照」即可免费在线翻译，无需下载模型或填写密钥。仅将你选择翻译的邮件正文发送给 Google，原文与缓存译文在本机加密保存；免费服务可能临时限流。
当前为未签名预览版，Mac 未经过 Apple 公证。
叠信 · Lettide 0.5.0
Lettide 0.5.0 · 叠信
English
Downloads
| Platform and package | English “Lettide” | 简体中文「叠信」 |
|---|---|---|
| Windows 10 / 11 · x64 | Download exe | 下载 exe |
| macOS 13+ · Apple Silicon + Intel | Download dmg | 下载 dmg |
What's new
- Add startup update notifications and in-app check, download and install controls, with verified files and draft preservation.
- Check Inbox and Sent every 30 seconds across accounts; unchanged Gmail folders use one incremental history check. SMTP-accepted mail is visible before its server Sent copy finishes saving.
- Translate selected message bodies online without a model download or API key. Add natural text chunks, a bounded deadline, independent cancellation and encrypted result caching.
- Make AI tool discovery independent of mail-service startup. Return compact search previews and refresh the UI only when shared mail data changes.
- Share OAuth renewal across concurrent operations, recover expired read requests, reserve an IMAP connection for reading and replace failed sessions.
- Show sent mail immediately after a backend send. Keep Outlook immutable message IDs and a durable provider receipt for checking uncertain sends without resending.
- Load text before attachments, preserve cached mail while syncing and show connection interruptions clearly. Improve translation settings, language labels and compact layouts.
Install and connect
- Windows: download and run the EXE installer.
- Mac: open the DMG and drag Lettide into Applications.
Node.js is included. Chinese downloads use 叠信; English downloads use Lettide. Change the interface language in Settings.
Google and Microsoft require an OAuth app for the first connection; QQ Mail requires an app password. Account setup. Click Translation or Side by side for free online translation without a model download or API key. Only the email body you select is sent to Google; your original and cached translation stay encrypted on this device. The free service may temporarily limit requests.
These installers are unsigned previews. The Mac app is not notarized.
简体中文
下载安装
| 系统与安装包 | 简体中文「叠信」 | English “Lettide” |
|---|---|---|
| Windows 10 / 11 · 64 位 | 下载 exe | Download exe |
| macOS 13+ · Apple 芯片与 Intel | 下载 dmg | Download dmg |
本次更新
- 增加启动更新提示，以及应用内检查、下载、安装按钮；核对安装文件并在更新前保存草稿。
- 各邮箱并行检查收件箱与已发送，间隔约 30 秒；Gmail 无变化时一次增量检查，SMTP 已发邮件在副本保存完成前即可查看。
- 选中的邮件正文直接在线翻译，无需模型或密钥；按自然边界分段，增加等待上限、独立取消与加密缓存。
- AI 工具加载不再等待邮箱服务启动；搜索只返回简短预览，界面按共享数据变化刷新。
- 并发操作共用授权续期，过期的读取请求可恢复；为阅读预留 IMAP 连接并淘汰失效会话。
- 后台发信后立即显示已发送；Outlook 保留稳定邮件标识及服务商回执，可核查不确定结果，避免重复发送。
- 正文优先、附件按需下载；同步时保留已有邮件，明确显示连接中断，并打磨翻译设置、语言标识和紧凑窗口。
安装与连接
- **Windows：**下载并双击 EXE 安装程序。
- **Mac：**打开 DMG，把叠信拖入「应用程序」。
内置 Node.js，无需另装运行环境。中文下载显示「叠信」，英文下载显示「Lettide」，界面语言可在设置中切换。
Google 和 Microsoft 首次连接需要 OAuth 应用，QQ 邮箱需要授权码。邮箱接入。点击「译文」或「对照」即可免费在线翻译，无需下载模型或填写密钥。仅将你选择翻译的邮件正文发送给 Google，原文与缓存译文在本机加密保存；免费服务可能临时限流。
当前为未签名预览版，Mac 未经过 Apple 公证。
叠信 · Lettide 0.4.2
Lettide 0.4.2 · 叠信
English
Downloads
| Platform and package | English “Lettide” | 简体中文「叠信」 |
|---|---|---|
| Windows 10 / 11 · x64 | Download exe | 下载 exe |
| macOS 13+ · Apple Silicon + Intel | Download dmg | 下载 dmg |
What's new
- Provide English and Chinese Windows EXE installers and universal Mac DMGs, with complete bilingual installation and account setup guides.
- Verify the installed app, localized name, encrypted storage, bundled translation dependencies and shared AI connection before publishing each installer.
- Keep Codex, Claude Code and the desktop app on the same Windows mail data directory, so their background connections use the same accounts.
- Store received attachments separately in encrypted files to reduce routine mail-cache rewrites. Verify all four public download links after publication.
Install and connect
- Windows: download and run the EXE installer.
- Mac: open the DMG and drag Lettide into Applications.
Node.js is included. Chinese downloads use 叠信; English downloads use Lettide. Change the interface language in Settings.
Google and Microsoft require an OAuth app for the first connection; QQ Mail requires an app password. Account setup. Download the offline translation model once (about 920 MB); email bodies then stay on your device during translation.
These installers are unsigned previews. The Mac app is not notarized.
简体中文
下载安装
| 系统与安装包 | 简体中文「叠信」 | English “Lettide” |
|---|---|---|
| Windows 10 / 11 · 64 位 | 下载 exe | Download exe |
| macOS 13+ · Apple 芯片与 Intel | 下载 dmg | Download dmg |
本次更新
- 提供 Windows EXE 与 Mac 通用 DMG 的中英文安装包，补齐双语安装和邮箱接入指南。
- 发布前检查安装后的应用、对应语言名称、加密存储、内置翻译依赖与共享 AI 连接。
- Codex、Claude Code 与桌面应用在 Windows 共用同一邮件数据目录，后台连接使用同一组邮箱。
- 收到的附件逐个加密保存，减少日常同步时重写邮件缓存；公开发布后核验四个直接下载链接。
安装与连接
- **Windows：**下载并双击 EXE 安装程序。
- **Mac：**打开 DMG，把叠信拖入「应用程序」。
内置 Node.js，无需另装运行环境。中文下载显示「叠信」，英文下载显示「Lettide」，界面语言可在设置中切换。
Google 和 Microsoft 首次连接需要 OAuth 应用，QQ 邮箱需要授权码。邮箱接入。离线翻译模型首次下载约 920 MB，之后翻译只在本机处理邮件正文。
当前为未签名预览版，Mac 未经过 Apple 公证。
叠信 · Lettide 0.3.11
下载 / Downloads
| 系统 / Platform | 简体中文 / Chinese | English / 英文 |
|---|---|---|
| Windows 10 / 11 · x64 | 叠信 · 安装程序 | Lettide · Windows installer |
| macOS 12+ · Apple Silicon + Intel | 叠信 · DMG | Lettide · Mac DMG |
更新 / What's new
中文
- 大邮箱同步、正文保存和状态操作不再反复复制未变化的附件字符串；只复制可修改的数据容器，保留事务失败回滚与全部附件。
- 比较同步状态时避免把未变化的大附件重复序列化，减少大缓存的内存与等待开销。
- 包含 0.3.10 的本地翻译修复、新缓存与错语种检查，以及 0.3.9 的连接复用和正文预取。
- 修正构建检查中已结束计时器误报同步阻塞的问题。
English
- Avoid repeatedly copying unchanged attachment strings during large-mailbox sync, body saves and status updates. Copy mutable containers while preserving transaction rollback and every attachment.
- Compare sync state without serializing unchanged large attachments, reducing memory and waiting overhead for large caches.
- Include the offline translation fixes, refreshed cache and script checks from 0.3.10, plus connection reuse and body prefetching from 0.3.9.
- Fix a build check whose expired timer could incorrectly report a blocked sync after the operation had already finished.
Installation and account setup
Run the Windows installer, or open the DMG and drag the app into Applications. Node.js is included. Chinese installers use the name 叠信; English installers use Lettide. You can switch the interface language in Settings.
Gmail and Microsoft 365 still require an OAuth app configuration for the first connection. QQ Mail requires an app password. Account setup guide
After a one-time offline model download (about 920 MB), click Translated or Compare to translate on this device. Model downloads contain no email text; translation never uploads the body or falls back to an online service.
These preview installers are unsigned, and the Mac app is not notarized. Successful builds do not establish live mailbox verification or a physical Mac UI acceptance test.
安装与连接
Windows 双击安装程序；macOS 打开 DMG 后拖入「应用程序」。无需另装 Node.js。中文版显示「叠信」，英文版显示「Lettide」，应用内可切换语言。
Gmail / Microsoft 365 首次连接仍需 OAuth 应用配置，QQ 需要邮箱授权码。邮箱接入指南
首次下载约 920 MB 离线模型后，点击「译文」或「对照」在本机翻译。模型下载不包含邮件正文，翻译不会上传正文或自动改用在线服务。
当前为未签名预览版，Mac 未经过 Apple 公证。安装包构建通过不等于真实邮箱或 Mac 真机界面已验收。
叠信 · Lettide 0.3.10
下载 / Downloads
| 系统 / Platform | 简体中文 / Chinese | English / 英文 |
|---|---|---|
| Windows 10 / 11 · x64 | 叠信 · 安装程序 | Lettide · Windows installer |
| macOS 12+ · Apple Silicon + Intel | 叠信 · DMG | Lettide · Mac DMG |
更新 / What's new
中文
- 修复长短段落混合批量翻译时，已结束的短段继续生成、混入其他语言并反复重复的问题。每段独立结束，保留逐段显示和原文结构。
- 按完整句子翻译，保留网址、邮箱地址、分隔线和简短署名，减少多句段落漏译与装饰文字误译。
- 明显错语种、异常重复和过度膨胀的结果不会被显示或缓存为成功译文；旧版翻译缓存不再复用。
- 保留 0.3.9 的邮箱连接复用、正文预取与保存队列优化。
- 安装包直接上传 GitHub Release，避免临时构建附件配额耗尽阻断下载。
English
- Fix mixed-length translation batches continuing to generate after a short segment has ended, producing repeated text in unrelated languages. End each segment independently while preserving progressive display and source structure.
- Translate complete sentences separately, retaining URLs, email addresses, separators and short signatures to reduce skipped sentences and mistranslated decoration.
- Reject visibly incorrect scripts, abnormal repetition and excessive expansion before showing or caching a successful translation. Invalidate older translation caches.
- Retain the IMAP connection reuse, body prefetching and save-queue improvements from 0.3.9.
- Upload installers directly to GitHub Releases so exhausted temporary build-artifact storage cannot block downloads.
Installation and account setup
Run the Windows installer, or open the DMG and drag the app into Applications. Node.js is included. Chinese installers use the name 叠信; English installers use Lettide. You can switch the interface language in Settings.
Gmail and Microsoft 365 still require an OAuth app configuration for the first connection. QQ Mail requires an app password. Account setup guide
After a one-time offline model download (about 920 MB), click Translated or Compare to translate on this device. Model downloads contain no email text; translation never uploads the body or falls back to an online service.
These preview installers are unsigned, and the Mac app is not notarized. Successful builds do not establish live mailbox verification or a physical Mac UI acceptance test.
安装与连接
Windows 双击安装程序；macOS 打开 DMG 后拖入「应用程序」。无需另装 Node.js。中文版显示「叠信」，英文版显示「Lettide」，应用内可切换语言。
Gmail / Microsoft 365 首次连接仍需 OAuth 应用配置，QQ 需要邮箱授权码。邮箱接入指南
首次下载约 920 MB 离线模型后，点击「译文」或「对照」在本机翻译。模型下载不包含邮件正文，翻译不会上传正文或自动改用在线服务。
当前为未签名预览版，Mac 未经过 Apple 公证。安装包构建通过不等于真实邮箱或 Mac 真机界面已验收。
叠信 · Lettide 0.3.9
下载 / Downloads
| 系统 / Platform | 简体中文 / Chinese | English / 英文 |
|---|---|---|
| Windows 10 / 11 · x64 | 叠信 · 安装程序 | Lettide · Windows installer |
| macOS 12+ · Apple Silicon + Intel | 叠信 · DMG | Lettide · Mac DMG |
更新 / What's new
中文
- 复用 IMAP 邮箱连接，减少打开邮件时反复登录的等待；当前列表中的少量小邮件会在后台准备正文，大邮件仍按需下载。
- 已读、星标和移动操作在联网时不再占用共用保存队列，避免拖慢正文、草稿和翻译结果的保存。
- 译文分段完成后逐步显示，无需等待整封翻译结束；保留原文、链接、取消和重试功能。离线全文翻译仍受设备性能与邮件长度影响。
- 尚未下载正文的邮件会显示准备状态，避免误显示为没有正文。
English
- Reuse IMAP connections to reduce repeated sign-in delays when opening messages. Prepare a few small messages from the visible list in the background; large messages remain on demand.
- Keep network work for read status, stars and moves out of the shared save queue so it cannot hold up message bodies, drafts or translation results.
- Show translated segments as they finish instead of waiting for the full email. Preserve original text, links, cancellation and retry. Full offline translation time still depends on the device and email length.
- Show a preparation state for messages whose bodies have not been downloaded, instead of indicating that they have no body.
Installation and account setup
Run the Windows installer, or open the DMG and drag the app into Applications. Node.js is included. Chinese installers use the name 叠信; English installers use Lettide. You can switch the interface language in Settings.
Gmail and Microsoft 365 still require an OAuth app configuration for the first connection. QQ Mail requires an app password. Account setup guide
After a one-time offline model download (about 920 MB), click Translated or Compare to translate on this device. Model downloads contain no email text; translation never uploads the body or falls back to an online service.
These preview installers are unsigned, and the Mac app is not notarized. Successful builds do not establish live mailbox verification or a physical Mac UI acceptance test.
安装与连接
Windows 双击安装程序；macOS 打开 DMG 后拖入「应用程序」。无需另装 Node.js。中文版显示「叠信」，英文版显示「Lettide」，应用内可切换语言。
Gmail / Microsoft 365 首次连接仍需 OAuth 应用配置，QQ 需要邮箱授权码。邮箱接入指南
首次下载约 920 MB 离线模型后，点击「译文」或「对照」在本机翻译。模型下载不包含邮件正文，翻译不会上传正文或自动改用在线服务。
当前为未签名预览版，Mac 未经过 Apple 公证。安装包构建通过不等于真实邮箱或 Mac 真机界面已验收。
叠信 · Lettide 0.3.8
下载 / Downloads
| 系统 / Platform | 简体中文 / Chinese | English / 英文 |
|---|---|---|
| Windows 10 / 11 · x64 | 叠信 · 安装程序 | Lettide · Windows installer |
| macOS 12+ · Apple Silicon + Intel | 叠信 · DMG | Lettide · Mac DMG |
更新 / What's new
English
- Save SMTP messages to the server's Sent folder with their attachments and reply headers. If saving fails after sending, retry only the copy and check its Message-ID to avoid duplicates.
- Add source language selection and cancellation for offline translations. Fix mixed-language detection, discard older translation caches, and report unchanged output as an error when translating between different languages.
- Bound stalled translation requests and show preparation and queue progress. Reduce repeated tokenization when splitting long emails; offline processing time still depends on the email and device.
中文
- SMTP 发信后将附件与回复信息一起保存到服务器的已发送文件夹。发送成功但副本保存失败时，可单独补存，并检查邮件标识避免重复。
- 离线翻译增加原文语言选择与取消入口，修复混合语言识别并更新翻译缓存。翻译不同语言时，如果模型返回原文，会明确提示失败。
- 为停滞的翻译请求设置超时，显示准备和排队状态，减少长邮件分段时的重复计算。离线翻译耗时仍取决于邮件长度与设备性能。
Installation and account setup
Run the Windows installer, or open the DMG and drag the app into Applications. Node.js is included. Chinese installers use the name 叠信; English installers use Lettide. You can switch the interface language in Settings.
Gmail and Microsoft 365 still require an OAuth app configuration for the first connection. QQ Mail requires an app password. Account setup guide
After a one-time offline model download (about 920 MB), click Translated or Compare to translate on this device. Model downloads contain no email text; translation never uploads the body or falls back to an online service.
These preview installers are unsigned, and the Mac app is not notarized. Successful builds do not establish live mailbox verification or a physical Mac UI acceptance test.
安装与连接
Windows 双击安装程序；macOS 打开 DMG 后拖入「应用程序」。无需另装 Node.js。中文版显示「叠信」，英文版显示「Lettide」，应用内可切换语言。
Gmail / Microsoft 365 首次连接仍需 OAuth 应用配置，QQ 需要邮箱授权码。邮箱接入指南
首次下载约 920 MB 离线模型后，点击「译文」或「对照」在本机翻译。模型下载不包含邮件正文，翻译不会上传正文或自动改用在线服务。
当前为未签名预览版，Mac 未经过 Apple 公证。安装包构建通过不等于真实邮箱或 Mac 真机界面已验收。
叠信 · Lettide 0.3.7
下载 / Downloads
| 系统 / Platform | 简体中文 / Chinese | English / 英文 |
|---|---|---|
| Windows 10 / 11 · x64 | 叠信 · 安装程序 | Lettide · Windows installer |
| macOS 12+ · Apple Silicon + Intel | 叠信 · DMG | Lettide · Mac DMG |
更新 / What's new
English
- Load Gmail message lists with concurrent metadata requests. Fetch bodies and attachments when opening a message, and reuse cached content on subsequent reads.
- Keep mailbox sync and content downloads from blocking draft saves, other folders, or translation updates. Preserve changes made while a sync is running.
中文
- Gmail 邮件列表并行获取摘要信息，打开邮件时再下载正文和附件；已下载的内容直接使用本机缓存。
- 邮箱同步和正文下载不再阻塞草稿保存、其他文件夹或翻译状态更新，并保留同步期间的操作结果。
Installation and account setup
Run the Windows installer, or open the DMG and drag the app into Applications. Node.js is included. Chinese installers use the name 叠信; English installers use Lettide. You can switch the interface language in Settings.
Gmail and Microsoft 365 still require an OAuth app configuration for the first connection. QQ Mail requires an app password. Account setup guide
After a one-time offline model download (about 920 MB), click Translated or Compare to translate on this device. Model downloads contain no email text; translation never uploads the body or falls back to an online service.
These preview installers are unsigned, and the Mac app is not notarized. Successful builds do not establish live mailbox verification or a physical Mac UI acceptance test.
安装与连接
Windows 双击安装程序；macOS 打开 DMG 后拖入「应用程序」。无需另装 Node.js。中文版显示「叠信」，英文版显示「Lettide」，应用内可切换语言。
Gmail / Microsoft 365 首次连接仍需 OAuth 应用配置，QQ 需要邮箱授权码。邮箱接入指南
首次下载约 920 MB 离线模型后，点击「译文」或「对照」在本机翻译。模型下载不包含邮件正文，翻译不会上传正文或自动改用在线服务。
当前为未签名预览版，Mac 未经过 Apple 公证。安装包构建通过不等于真实邮箱或 Mac 真机界面已验收。
叠信 · Lettide 0.3.6
下载 / Downloads
| 系统 / Platform | 简体中文 / Chinese | English / 英文 |
|---|---|---|
| Windows 10 / 11 · x64 | 叠信 · 安装程序 | Lettide · Windows installer |
| macOS 12+ · Apple Silicon + Intel | 叠信 · DMG | Lettide · Mac DMG |
更新 / What's new
English
- Translate short paragraphs in batches while preserving line breaks and links. Show actual offline translation progress and distinguish queued requests.
- Recover a stalled local translation worker after a timeout, and allow retrying without restarting the app. Long emails still take time to process on the device.
- Show which browser authorization step failed without exposing credentials, so Gmail connection problems can be diagnosed.
中文
- 短段落批量翻译，保留换行和链接；显示离线翻译实际进度，并区分排队中的请求。
- 本地翻译超时后恢复模型进程，可直接重试，无需重启应用；长邮件仍需要本机计算时间。
- 浏览器授权失败时区分失败步骤，方便排查 Gmail 连接问题，同时避免显示凭据。
Installation and account setup
Run the Windows installer, or open the DMG and drag the app into Applications. Node.js is included. Chinese installers use the name 叠信; English installers use Lettide. You can switch the interface language in Settings.
Gmail and Microsoft 365 still require an OAuth app configuration for the first connection. QQ Mail requires an app password. Account setup guide
After a one-time offline model download (about 920 MB), click Translated or Compare to translate on this device. Model downloads contain no email text; translation never uploads the body or falls back to an online service.
These preview installers are unsigned, and the Mac app is not notarized. Successful builds do not establish live mailbox verification or a physical Mac UI acceptance test.
安装与连接
Windows 双击安装程序；macOS 打开 DMG 后拖入「应用程序」。无需另装 Node.js。中文版显示「叠信」，英文版显示「Lettide」，应用内可切换语言。
Gmail / Microsoft 365 首次连接仍需 OAuth 应用配置，QQ 需要邮箱授权码。邮箱接入指南
首次下载约 920 MB 离线模型后，点击「译文」或「对照」在本机翻译。模型下载不包含邮件正文，翻译不会上传正文或自动改用在线服务。
当前为未签名预览版，Mac 未经过 Apple 公证。安装包构建通过不等于真实邮箱或 Mac 真机界面已验收。
叠信 · Lettide 0.3.5
下载 / Downloads
| 系统 / Platform | 简体中文 / Chinese | English / 英文 |
|---|---|---|
| Windows 10 / 11 · x64 | 叠信 · 安装程序 | Lettide · Windows installer |
| macOS 12+ · Apple Silicon + Intel | 叠信 · DMG | Lettide · Mac DMG |
更新 / What's new
English
- Retry service startup when the previous backend is still releasing its data lock, so AI assistants can reconnect after a restart. Includes the cache, account-management and language-control improvements from 0.3.4.
中文
- 旧后台尚未释放数据锁时自动重试启动，让 AI 助手在后台重启后恢复连接；包含 0.3.4 的缓存提速、邮箱管理及语言入口优化。
Installation and account setup
Run the Windows installer, or open the DMG and drag the app into Applications. Node.js is included. Chinese installers use the name 叠信; English installers use Lettide. You can switch the interface language in Settings.
Gmail and Microsoft 365 still require an OAuth app configuration for the first connection. QQ Mail requires an app password. Account setup guide
After a one-time offline model download (about 920 MB), click Translated or Compare to translate on this device. Model downloads contain no email text; translation never uploads the body or falls back to an online service.
These preview installers are unsigned, and the Mac app is not notarized. Successful builds do not establish live mailbox verification or a physical Mac UI acceptance test.
安装与连接
Windows 双击安装程序；macOS 打开 DMG 后拖入「应用程序」。无需另装 Node.js。中文版显示「叠信」，英文版显示「Lettide」，应用内可切换语言。
Gmail / Microsoft 365 首次连接仍需 OAuth 应用配置，QQ 需要邮箱授权码。邮箱接入指南
首次下载约 920 MB 离线模型后，点击「译文」或「对照」在本机翻译。模型下载不包含邮件正文，翻译不会上传正文或自动改用在线服务。
当前为未签名预览版，Mac 未经过 Apple 公证。安装包构建通过不等于真实邮箱或 Mac 真机界面已验收。