📧 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.

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🔎 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

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⚙️ 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

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📱 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

6. 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

4. Complete setup

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

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💻 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)

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⚠️ 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.

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🧪 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

4. 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

4. Wait about 45 seconds

If this times out:

• Port 465 is blocked

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⚠️ 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.

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📌 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

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💬 Need Help? #

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

📧 support@k12usa.com
📞 732-359-1522
🌐 www.k12usa.com/support/