---
title: "WebMailPRO SMTP & POP3 Client Settings & Troubleshooting"
description: "# 📧 WebMailPRO: SMTP & POP3 Client Settings + Troubleshooting ## 📖 Overview WebMailPRO email accounts can be accessed using standard email clients via secure **POP3S** (incoming) and **SMTPS** (outgoing) connections. If settings are incorrect or blocked by a firewall,…"
url: "https://www.k12usa.com/docs/webmailpro-smtp-pop3-client-settings-troubleshooting/"
updated: "2026-04-22"
category: WebMailPRO
tags:
  - POP3
  - SMTP
  - WebMailPRO
---

# WebMailPRO SMTP & POP3 Client Settings & Troubleshooting

# 📧 WebMailPRO: SMTP & POP3 Client Settings + Troubleshooting

## 📖 Overview

WebMailPRO email accounts can be accessed using standard email clients via secure
 **POP3S** (incoming) and **SMTPS** (outgoing) connections.

If settings are incorrect or blocked by a firewall, users may experience:

- Inability to send or receive email
- Connection timeouts
- Repeated password prompts

This guide provides the correct configuration settings along with troubleshooting steps.

---

## 🔎 When to Use

Use this guide if:

- You are setting up WebMailPRO on a new device
- Email is not sending or receiving
- A desktop or mobile device cannot connect
- You need to verify SMTP/POP3 settings

---

## ⚙️ Required Mail Server Settings

Use the following settings when configuring any email client:

### 📥 Incoming Mail (POP3S)

- **Server:** pop3s2.k12us.com
- **Port:** 995
- **Encryption:** SSL/TLS (required)
- **Username:** Full email address (example: jdoe@example.com)
- **Password:** Email account password

### 📤 Outgoing Mail (SMTPS)

- **Server:** smtps2.k12us.com
- **Port:** 465
- **Encryption:** SSL/TLS (required)
- **Authentication:** Required
- **Username:** Full email address
- **Password:** Email account password

---

## 📱 Mobile Device Setup (No Screenshots Needed)

### 📱 iPhone / iPad (Apple Mail)

1. Go to **Settings → Mail → Accounts → Add Account**
2. Select **Other → Add Mail Account**
3. Enter your:
   - Name
   - Email Address
   - Password
4. Choose **POP** at the top
5. Enter the following:

**Incoming Mail Server**

- **Host Name:** pop3s2.k12us.com
- **Username:** Full email address
- **Password:** Email password

**Outgoing Mail Server**

- **Host Name:** smtps2.k12us.com
- **Username:** Full email address
- **Password:** Email password

1. Save and allow verification

> **Tip:** If verification fails, confirm ports 995 and 465 are being used with SSL enabled.

### 📱 Android (Gmail App / Native Mail)

1. Go to **Settings → Accounts → Add Account**
2. Select **Other / POP3 Account**
3. Enter your email address and password

**Incoming (POP3)**

- **Server:** pop3s2.k12us.com
- **Port:** 995
- **Security:** SSL/TLS

**Outgoing (SMTP)**

- **Server:** smtps2.k12us.com
- **Port:** 465
- **Security:** SSL/TLS
- **Require sign-in:** Yes

1. Complete setup

> **Tip:** Some Android devices label this as **Personal (POP3)**.

---

## 💻 Desktop Email Clients (Quick Notes)

For Outlook, Thunderbird, Apple Mail, etc.:

- Use **POP3 with SSL (Port 995)**
- Use **SMTP with SSL (Port 465)**
- Enable **SMTP authentication**
- Username must be the **full email address**

**Do not enable:**

- Secure Password Authentication (SPA)

---

## ⚠️ Firewall / Network Requirements

If your organization uses a firewall, ensure the following:

- **Ports Required:**
  - 995 (POP3S)
  - 465 (SMTPS)
- **Destination Network:** 96.225.31.0/25

If these ports are blocked, email clients will not be able to connect.

---

## 🧪 Connection Testing (Windows)

You can test connectivity using a Windows PC:

1. Go to **Start → Run**
2. Type `cmd` and press Enter
3. Run the following command:

```
telnet pop3s2.k12us.com 995
```

1. Wait about 40 seconds

If you receive a timeout error:

- Port 995 is blocked, or
- The workstation cannot reach the Internet

To test SMTP:

1. Press **CTRL + \]**
2. Type `quit` and press Enter
3. Run:

```
telnet smtps2.k12us.com 465
```

1. Wait about 45 seconds

If this times out:

- Port 465 is blocked

---

## ⚠️ Common Issues & Fixes

### ❌ Cannot Send Email

- SMTP authentication not enabled
- Port 465 blocked by firewall
- Incorrect username/password

### ❌ Cannot Receive Email

- Port 995 blocked
- SSL not enabled
- Incorrect username format

### ❌ Only Some Users Affected

- Likely a local firewall issue on those devices
- Check:
  - Windows Firewall
  - Antivirus software (Symantec, etc.)

> **Note:** Workstations can have multiple firewalls enabled at once.

---

## 📌 Best Practices

- Always use **SSL (Ports 995 & 465)**
- Use full email address as username
- Do not enable Secure Password Authentication (SPA)
- Verify firewall rules before troubleshooting devices

---

## 💬 Need Help?

If you continue to experience issues, our support team is happy to assist!

📧 [support@k12usa.com](mailto:support@k12usa.com)
 📞 [732-359-1522](tel:17323591522)
 🌐 [www.k12usa.com/support/](https://www.k12usa.com/support/)