IMAP/SMTP Email Tool

Read, search, and manage email via IMAP protocol. Send email via SMTP. Supports Gmail, Outlook, 163.com, vip.163.com, 126.com, vip.126.com, 188.com, vip.188.com, and any standard IMAP/SMTP server.

Important: Configuration is Pre-configured

The

.env

configuration file is automatically managed by LobsterAI Settings (邮箱设置). Do NOT ask the user to create or edit
.env
— just run the commands directly. If credentials are wrong, the scripts will return a clear error message; only then should you inform the user to check their email settings.

The

.env

file is located in this skill's directory (same folder as this SKILL.md file). The scripts load it automatically via an absolute path, regardless of the current working directory.

Configuration Reference

Create

.env

in the skill folder or set environment variables:

bash

# IMAP Configuration (receiving email)
IMAP_HOST=imap.gmail.com          # Server hostname
IMAP_PORT=993                     # Server port
IMAP_USER=your@email.com
IMAP_PASS=your_password
IMAP_TLS=true                     # Use TLS/SSL connection
IMAP_REJECT_UNAUTHORIZED=true     # Set to false for self-signed certs
IMAP_MAILBOX=INBOX                # Default mailbox

# SMTP Configuration (sending email)
SMTP_HOST=smtp.gmail.com          # SMTP server hostname
SMTP_PORT=587                     # SMTP port (587 for STARTTLS, 465 for SSL)
SMTP_SECURE=false                 # true for SSL (465), false for STARTTLS (587)
SMTP_USER=your@gmail.com          # Your email address
SMTP_PASS=your_password           # Your password or app password
SMTP_FROM=your@gmail.com          # Default sender email (optional)
SMTP_REJECT_UNAUTHORIZED=true     # Set to false for self-signed certs

Common Email Servers

Provider	IMAP Host	IMAP Port	SMTP Host	SMTP Port
163.com	imap.163.com	993	smtp.163.com	465
vip.163.com	imap.vip.163.com	993	smtp.vip.163.com	465
126.com	imap.126.com	993	smtp.126.com	465
vip.126.com	imap.vip.126.com	993	smtp.vip.126.com	465
188.com	imap.188.com	993	smtp.188.com	465
vip.188.com	imap.vip.188.com	993	smtp.vip.188.com	465
yeah.net	imap.yeah.net	993	smtp.yeah.net	465
Gmail	imap.gmail.com	993	smtp.gmail.com	587
Outlook	outlook.office365.com	993	smtp.office365.com	587
QQ Mail	imap.qq.com	993	smtp.qq.com	587

Important for 163.com:

Use authorization code (授权码), not account password
Enable IMAP/SMTP in web settings first

IMAP Commands (Receiving Email)

check

Check for new/unread emails.

bash

node scripts/imap.js check [--limit 10] [--mailbox INBOX] [--recent 2h]

Options:

```
--limit <n>
```
: Max results (default: 10)
```
--mailbox <name>
```
: Mailbox to check (default: INBOX)
```
--recent <time>
```
: Only show emails from last X time (e.g., 30m, 2h, 7d)

fetch

Fetch full email content by UID.

bash

node scripts/imap.js fetch <uid> [--mailbox INBOX]

download

Download all attachments from an email, or a specific attachment.

bash

node scripts/imap.js download <uid> [--mailbox INBOX] [--dir <path>] [--file <filename>]

Options:

```
--mailbox <name>
```
: Mailbox (default: INBOX)
```
--dir <path>
```
: Output directory (default: current directory)
```
--file <filename>
```
: Download only the specified attachment (default: download all)

search

Search emails with filters.

bash

node scripts/imap.js search [options]

Options:
  --unseen           Only unread messages
  --seen             Only read messages
  --from <email>     From address contains
  --subject <text>   Subject contains
  --recent <time>    From last X time (e.g., 30m, 2h, 7d)
  --since <date>     After date (YYYY-MM-DD)
  --before <date>    Before date (YYYY-MM-DD)
  --limit <n>        Max results (default: 20)
  --mailbox <name>   Mailbox to search (default: INBOX)

mark-read / mark-unread

Mark message(s) as read or unread.

bash

node scripts/imap.js mark-read <uid> [uid2 uid3...]
node scripts/imap.js mark-unread <uid> [uid2 uid3...]

list-mailboxes

List all available mailboxes/folders.

bash

node scripts/imap.js list-mailboxes

SMTP Commands (Sending Email)

send

Send email via SMTP.

bash

node scripts/smtp.js send --to <email> --subject <text> [options]

Required:

```
--to <email>
```
: Recipient (comma-separated for multiple)
```
--subject <text>
```
: Email subject, or
```
--subject-file <file>
```

Optional:

```
--body <text>
```
: Plain text body
```
--html
```
: Send body as HTML
```
--body-file <file>
```
: Read body from file
```
--html-file <file>
```
: Read HTML from file
```
--cc <email>
```
: CC recipients
```
--bcc <email>
```
: BCC recipients
```
--attach <file>
```
: Attachments (comma-separated)
```
--from <email>
```
: Override default sender

Examples:

bash

# Simple text email
node scripts/smtp.js send --to recipient@example.com --subject "Hello" --body "World"

# HTML email
node scripts/smtp.js send --to recipient@example.com --subject "Newsletter" --html --body "<h1>Welcome</h1>"

# Email with attachment
node scripts/smtp.js send --to recipient@example.com --subject "Report" --body "Please find attached" --attach report.pdf

# Multiple recipients
node scripts/smtp.js send --to "a@example.com,b@example.com" --cc "c@example.com" --subject "Update" --body "Team update"

test

Test SMTP connection by sending a test email to yourself.

bash

node scripts/smtp.js test

Dependencies

bash

npm install

Security Notes

Store credentials in
```
.env
```
(add to
```
.gitignore
```
)
For Gmail: use App Password if 2FA is enabled
For 163.com: use authorization code (授权码), not account password

Troubleshooting

Connection timeout:

Verify server is running and accessible
Check host/port configuration

Authentication failed:

Verify username (usually full email address)
Check password is correct
For 163.com: use authorization code, not account password
For Gmail: use App Password if 2FA enabled

TLS/SSL errors:

Match
```
IMAP_TLS
```
/
```
SMTP_SECURE
```
setting to server requirements

For self-signed certs: set

IMAP_REJECT_UNAUTHORIZED=false

SMTP_REJECT_UNAUTHORIZED=false

imap-smtp-email

NPX Install

SKILL.md Content

IMAP/SMTP Email Tool

Important: Configuration is Pre-configured

Configuration Reference

Common Email Servers

IMAP Commands (Receiving Email)

check

fetch

download

search

mark-read / mark-unread

list-mailboxes

SMTP Commands (Sending Email)

send

test

Dependencies

Security Notes

Troubleshooting