How to Connect Your Mailbox to Third-Party Email Clients

Connecting your custom domain mailbox ([email protected]) to third-party email clients allows you to send and receive emails directly from your smartphone, tablet, or desktop computer.

This step-by-step guide covers the universal mail server settings and instructions for configuring Microsoft Outlook, Apple Mail (iOS & Mac), Mozilla Thunderbird, and the Gmail App.

Universal Mail Server Connection Settings

Regardless of which email application you use, enter these server settings provided by your Cubes Hosting DirectAdmin control panel:

Incoming Mail Server (IMAP - Recommended)

• Protocol: IMAP
• Server Hostname: mail.yourdomain.com (Replace yourdomain.com with your actual domain name)
• Port: 993
• Encryption Method: SSL / TLS
• Username: Your full email address (e.g., [email protected])
• Password: Your email account password

Outgoing Mail Server (SMTP)

• Protocol: SMTP
• Server Hostname: mail.yourdomain.com
• Port: 465 (SSL/TLS) or 587 (STARTTLS)
• Encryption Method: SSL / TLS
• Authentication Required: Yes (Use the exact same username and password as Incoming Mail)

Step-by-Step Instructions by Email Client

1. Apple Mail (iPhone, iPad, Mac)

1. On iPhone/iPad, go to Settings > Mail > Accounts > Add Account.
2. Select Other, then tap Add Mail Account.
3. Enter your Name, Full Email Address, and Password. Tap Next.
4. Select IMAP at the top.
5. Under Incoming Mail Server and Outgoing Mail Server, enter:
   • Host Name: mail.yourdomain.com
   • User Name: [email protected]
   • Password: Your email password
6. Tap Save.

2. Microsoft Outlook (Windows & Mac)

1. Open Outlook and click File > Add Account (or Accounts > + Add Account).
2. Type your full email address ([email protected]) and click Advanced Options > Let me set up my account manually.
3. Select IMAP.
4. Enter the incoming and outgoing server details:
   • Incoming Port: 993 | Encryption: SSL/TLS
   • Outgoing Port: 465 | Encryption: SSL/TLS
5. Click Next, enter your email password, and click Connect.

3. Mozilla Thunderbird

1. Open Thunderbird, click the menu icon, and select Account Settings > Account Actions > Add Mail Account.
2. Enter your Name, Email Address, and Password, then click Configure manually.
3. Set Protocol to IMAP:
   • Hostname: mail.yourdomain.com
   • Port: 993 (Incoming) / 465 (Outgoing)
   • SSL: SSL/TLS
   • Authentication: Normal Password
4. Click Re-test and then click Done.

4. Gmail App (Android & iOS)

1. Open the Gmail App, tap your profile icon in the top right, and select Add another account.
2. Select Other.
3. Type your full email address and select Personal (IMAP).
4. Enter your email password.
5. On the Incoming Server screen, change Server to mail.yourdomain.com.
6. On the Outgoing Server screen, ensure Require sign-in is enabled and Server is set to mail.yourdomain.com.
7. Tap Next to finish setup!

Troubleshooting Connection Errors

• Authentication Failed / Incorrect Password: Ensure you enter your full email address ([email protected]) in the Username field. Typing just user will cause login failure.
• SMTP Relay Denied / Cannot Send Email: Ensure "My outgoing server (SMTP) requires authentication" is checked in your client settings.
• SSL Certificate Warning: Ensure your server hostname is set to mail.yourdomain.com and that your free Let's Encrypt SSL certificate is active in your DirectAdmin panel.

Related Guides

• IMAP vs POP3: Understanding Email Protocols for Your Domain

Conclusion

Connecting your custom domain mailbox to third-party mail clients is quick and easy. Use IMAP Port 993 and SMTP Port 465 with SSL enabled, enter your full email address as the username, and stay connected across all your devices!