Mozilla Thunderbird

  1. Create a new mail account
  2. Fill in the details and hit on continue
  3. Skip auto conifg and go for a manual config
  4. Do the following settings
    Incoming: IMAP; Port: 143; SSL: STARTTLS; Authentication: Normal
    Outgoing: SMTP; Port: 25; SSL: STARTTLS; Authentication: Normal
    The remaining details must be filled as per the server hostname and the respective username
  5. Hit on done and the mail client is ready.