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Configuring Email Clients (Outlook & Thunderbird)

Last Updated: March 2026 2 min read

Overview

Desktop email clients like Microsoft Outlook and Mozilla Thunderbird let you manage your email offline, organize messages into folders, and work with multiple accounts from a single interface. This guide covers how to add your domain email account to both clients.

Before You Begin

You will need the following information from your email provider or 10Corp dashboard:

  • Email address (e.g., you@yourdomain.com)
  • Password
  • Incoming mail server (IMAP or POP3 hostname)
  • Outgoing mail server (SMTP hostname)
  • Ports and encryption (SSL/TLS settings)

Configuring Microsoft Outlook

Outlook (Microsoft 365 / Outlook 2019+)

  1. Open Outlook and go to File > Add Account.
  2. Enter your full email address and click Connect.
  3. If auto-discover does not work, select Advanced options > Let me set up my account manually.
  4. Choose IMAP (recommended) or POP3.
  5. Enter the server settings:
SettingValue
Incoming ServerYour IMAP/POP3 server
Incoming Port993 (IMAP/SSL) or 995 (POP3/SSL)
EncryptionSSL/TLS
Outgoing ServerYour SMTP server
Outgoing Port465 (SSL) or 587 (STARTTLS)
Outgoing EncryptionSSL/TLS or STARTTLS
  1. Enter your password when prompted and click Connect.
  2. Once the account is verified, click Done.

Outlook (Classic / 2016)

  1. Go to File > Account Settings > New.
  2. Select Manual setup or additional server types > POP or IMAP.
  3. Fill in the server fields as shown in the table above.
  4. Click More Settings > Outgoing Server tab and check My outgoing server (SMTP) requires authentication.
  5. Under the Advanced tab, set the correct ports and encryption methods.
  6. Click Test Account Settings to verify, then Finish.

Configuring Mozilla Thunderbird

  1. Open Thunderbird and go to Account Settings > Account Actions > Add Mail Account.
  2. Enter your name, email address, and password, then click Configure manually.
  3. Set the incoming and outgoing server details:
SettingIncoming (IMAP)Outgoing (SMTP)
ServerYour IMAP serverYour SMTP server
Port993465 or 587
SSLSSL/TLSSSL/TLS or STARTTLS
AuthenticationNormal passwordNormal password
  1. Click Re-test to verify the configuration.
  2. Click Done to add the account.

Tips

  • IMAP vs. POP3 — Use IMAP if you access email from multiple devices, as it syncs messages across all of them. POP3 downloads messages to one device and optionally deletes them from the server.
  • Authentication errors — Ensure you are using the full email address as the username, not just the part before the @.
  • Firewall or antivirus — Some security software blocks email ports. Temporarily disable it to test if that is the issue.
  • Two-factor authentication — If your email provider supports 2FA, you may need to generate an app-specific password.
Tags: email outlook thunderbird email-client setup

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