> ## Documentation Index
> Fetch the complete documentation index at: https://sendroid.app/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Overview

> General guidance on IMAP, SMTP, and app passwords, plus a quick reference by provider

When connecting your mailbox in a third-party email client (Outlook, Apple Mail, Thunderbird, etc.) or a custom app, you typically need **IMAP** (incoming) and **SMTP** (outgoing) server details, plus an **app password** or **authorization code**—not your web login password.

<Warning>
  Most major email providers require **two-factor authentication (2FA)** before you can generate an app password. Enable 2FA in your account security settings first, then follow the guide for your provider.
</Warning>

## Key concepts

| Term                   | Description                                                                                     |
| ---------------------- | ----------------------------------------------------------------------------------------------- |
| **IMAP**               | Syncs mail on the server; ideal for multiple devices                                            |
| **SMTP**               | Outgoing protocol used to send email                                                            |
| **App password**       | A standalone \~16-character password for third-party apps; can be revoked anytime               |
| **Authorization code** | Client-specific password used by some providers (e.g. QQ, NetEase 163); not your login password |
| **OAuth**              | Some clients support OAuth sign-in and do not require an app password                           |

## Browse by provider

<Columns cols={2}>
  <Card title="Gmail / Google" icon="google" href="/guides/email/gmail">
    App passwords and IMAP/SMTP settings
  </Card>

  <Card title="Outlook / Microsoft" icon="microsoft" href="/guides/email/outlook">
    Microsoft app passwords and server settings
  </Card>

  <Card title="Yahoo Mail" icon="yahoo" href="/guides/email/yahoo">
    Yahoo app passwords and IMAP/SMTP
  </Card>

  <Card title="iCloud Mail" icon="apple" href="/guides/email/icloud">
    Apple app-specific password setup
  </Card>

  <Card title="AOL Mail" icon="envelope" href="/guides/email/aol">
    AOL app passwords and server settings
  </Card>

  <Card title="Zoho Mail" icon="z" href="/guides/email/zoho">
    Zoho app passwords and IMAP/SMTP
  </Card>

  <Card title="QQ Mail" icon="qq" href="/guides/email/qq">
    Authorization codes and server settings
  </Card>

  <Card title="NetEase 163 / 126" icon="at" href="/guides/email/netease">
    Authorization codes and IMAP/SMTP
  </Card>

  <Card title="Proton Mail" icon="shield" href="/guides/email/proton">
    Bridge and paid IMAP options
  </Card>
</Columns>

## Quick reference

| Provider                           | App password / auth code    | IMAP server                 | SMTP server                    |
| ---------------------------------- | --------------------------- | --------------------------- | ------------------------------ |
| [Gmail](/guides/email/gmail)       | Google app password         | `imap.gmail.com:993`        | `smtp.gmail.com:465` or `:587` |
| [Outlook](/guides/email/outlook)   | Microsoft app password      | `outlook.office365.com:993` | `smtp.office365.com:587`       |
| [Yahoo](/guides/email/yahoo)       | Yahoo app password          | `imap.mail.yahoo.com:993`   | `smtp.mail.yahoo.com:465`      |
| [iCloud](/guides/email/icloud)     | Apple app-specific password | `imap.mail.me.com:993`      | `smtp.mail.me.com:587`         |
| [AOL](/guides/email/aol)           | AOL app password            | `imap.aol.com:993`          | `smtp.aol.com:465`             |
| [Zoho](/guides/email/zoho)         | Zoho app password           | `imap.zoho.com:993`         | `smtp.zoho.com:465`            |
| [QQ](/guides/email/qq)             | Mail authorization code     | `imap.qq.com:993`           | `smtp.qq.com:465`              |
| [163 / 126](/guides/email/netease) | Mail authorization code     | `imap.163.com:993`          | `smtp.163.com:465`             |

## FAQ

<AccordionGroup>
  <Accordion title="Connection failed: username or password incorrect">
    Confirm you are using an **app password or authorization code**, not your web login password. For Gmail, verify IMAP is enabled in the web settings. For QQ/163, regenerate the authorization code if it expired or after re-enabling the service.
  </Accordion>

  <Accordion title="SMTP fails but IMAP works">
    Check that the SMTP port matches the encryption method (465 for SSL, 587 for STARTTLS). Some networks block ports 465/587—try switching ports or networks.
  </Accordion>

  <Accordion title="Cannot find Google app passwords">
    You must enable **two-step verification** first. Google Workspace admins may disable this feature. Some account types that sign in only through Google do not support app passwords.
  </Accordion>

  <Accordion title="Outlook requires Modern Authentication">
    Enterprise Microsoft 365 may disable basic authentication. Use an OAuth-capable client, or ask your IT admin to enable SMTP AUTH if policy allows.
  </Accordion>
</AccordionGroup>

<Check>
  After setup, test both **incoming (IMAP)** and **outgoing (SMTP)** once in your client before using the account in production or automation.
</Check>

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