如果你在使用后信时遇到问题，或者有功能建议、安全反馈，请通过以下方式联系我们：
If you have any issue, suggestion, or security report, please reach out:
应用密码为本地派生密钥，遗忘后无法找回。你可以在"设置 → 清除所有数据"重置 App，但所有未导出的本地信件将无法解密。请使用"设置 → 加密备份"提前导出备份文件，备份密码与应用密码可以不同。
The passcode derives a local key. It cannot be recovered if forgotten. You can reset everything from "Settings → Erase all data", but unexported local letters will be unreadable. Always use "Settings → Encrypted backup" to keep an offline copy.
你的本地数据永远保留。账号注册后，你写的信件加密上传到我们的服务器以支持"无人值守送达"，你可以随时在设置里删除账号或单独删除信件。
Local data is kept indefinitely. Letters synced to our server (for unattended delivery) can be deleted at any time from Settings, or by deleting your account.
打开 App → 设置 → 安全 → 退出登录，然后联系 [email protected] 要求删除账号。我们会在 30 天内永久删除你的账号、所有信件、附件和保险箱内容。
Open the App → Settings → Security → Sign out, then email [email protected] requesting account deletion. We will permanently delete your account, letters, attachments, and vault contents within 30 days.
如果你收到了通过后信送达的骚扰、违法、欺诈内容，请把那封邮件转发给 [email protected]，我们会在 24 小时内处理并封禁发件账号。
If you receive harassing, illegal, or fraudulent content delivered via Afterword, please forward the email to [email protected]. We respond within 24 hours and may suspend the sending account.