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Troubleshooting Email Client Configuration: Common Setup and Migration Errors

Last updated on Jul 24, 2025

Troubleshooting Email Client Configuration: Common Setup and Migration Errors

Description:
This comprehensive guide will help you identify and resolve common email client configuration issues during domain transfers or email migrations. It covers IMAP/SMTP settings, authentication errors, and compatibility problems, tailored for shared hosting customers using cPanel.


Table of Contents


Introduction

When transferring domains or migrating email accounts, you may encounter issues connecting your email client (such as Outlook, Thunderbird, Apple Mail) to your mailbox. This guide provides practical solutions for the most frequent problems faced by shared hosting users.


Essential Email Client Settings

Before configuring your email client, gather the following details from your cPanel or welcome email:

Setting Description Common Value/Example
Email Address Full address user@yourdomain.com
Username Email address (usually same) user@yourdomain.com
Password Email password (set in cPanel)
Incoming Server Server for incoming mail mail.yourdomain.com or server hostname
IMAP Port For IMAP (recommended) 993 (SSL/TLS) or 143 (non-SSL)
POP3 Port For POP3 995 (SSL/TLS) or 110 (non-SSL)
Outgoing Server Server for outgoing mail mail.yourdomain.com or server hostname
SMTP Port For sending mail 465 (SSL/TLS) or 587 (STARTTLS)
Encryption Connection security SSL/TLS or STARTTLS

Step-by-Step: Configuring Your Email Client

  1. Log in to cPanel
    • Navigate to Email Accounts.
    • Locate your email address and click Set Up Mail Client for configuration details.
  2. Open Your Email Client (e.g., Outlook, Thunderbird).
  3. Add a New Account.
    • Choose Manual Setup if available.
  4. Enter Account Information:
    • Name, Email Address, and Password.
  5. Specify Incoming Server Settings:
    • Choose IMAP (recommended) or POP3.
    • Use the correct server name and port (see table above).
  6. Specify Outgoing Server (SMTP) Settings:
    • Enter server name and port.
    • Enable authentication (use same login as incoming).
  7. Set Encryption Method:
    • Choose SSL/TLS or STARTTLS if offered.
  8. Finish Setup and Test Connection.

Example (IMAP, SSL):

Incoming Server (IMAP): mail.yourdomain.com
Port: 993
Encryption: SSL/TLS

Outgoing Server (SMTP): mail.yourdomain.com
Port: 465
Encryption: SSL/TLS
Authentication: Yes (same as incoming)

Common Configuration Errors & Solutions

1. Authentication Failed / Incorrect Password

  • Solution:
    • Double-check the password in cPanel (Email Accounts > Manage > Change Password).
    • Ensure you are using your full email address as the username.

2. Cannot Connect to Server / Server Not Responding

  • Solution:
    • Verify you are using the correct mail server (mail.yourdomain.com or server hostname).
    • Ensure your domain's DNS records (MX, A, CNAME) point to your hosting server.
    • Try connecting via webmail to confirm mailbox works:
      https://yourdomain.com/webmail

3. SMTP Authentication Required / "Please turn on SMTP Authentication"

  • Solution:
    • In your email client, ensure “My outgoing server (SMTP) requires authentication” is enabled.
    • Use the same username and password for SMTP as for IMAP/POP3.

4. SSL Certificate Warnings

  • Solution:
    • Use the server hostname (found in cPanel or your welcome email) instead of your domain if SSL mismatch occurs.
    • Accept the certificate if you trust the server.

5. Mails Not Received After Migration

  • Solution:
    • Confirm MX records are updated to the new hosting provider.
      (Check in cPanel > Zone Editor)
    • Propagation may take up to 24 hours.

6. Emails Missing After Migration

  • Solution:
    • Use the IMAP Migration tool in cPanel’s Migration Center.
    • Ensure all email accounts are created on the new server before migrating.

Troubleshooting Migration Issues

Emails Delivering to Old Server

  • Check:
    • MX records may still point to the old server.
    • Use online tools like MXToolbox to verify.

Email Client Still Shows Old Emails Only

  • Check:
    • Remove and re-add the account in your email client after migration.
    • Use IMAP for real-time sync with the server.

"550 Sender Verify Failed" or "Relaying Denied"

  • Solution:
    • Ensure correct SMTP authentication is enabled.
    • If using third-party providers (e.g., Google Workspace), update SPF records accordingly.

Helpful Tools & Where to Find Settings

  • cPanel:
    • Email account creation, password resets, and configuration details.
  • Webmail:
    • Access email directly: https://yourdomain.com/webmail
  • File Manager:
    • (Advanced) Download/upload mailbox files if needed.
  • Migration Center:
    • For IMAP email migrations.

Further Assistance

If you continue to experience issues:

  • Double-check all settings and DNS records.
  • Refer to our Email Hosting Knowledge Base for more guides.
  • Open a support ticket through your client area with detailed steps you’ve taken, error messages, and affected email addresses for efficient help.

By following this guide, most email client configuration and migration issues can be resolved independently. For persistent issues, our support team is ready to assist!