incoming mail.twc,com outgoingmail.twc,com

There needs to be a dot in between twc and com, not a comma.

Thanks for spotting the typo. Unfortunately, after correcting the typo (using search & replace to make sure I got them all) i still get the same error message. "Thunderbird failed to find the settings for your email account." Oddly, I tried the same settings with Office 2010 (including the typo, as far as I can determine) and was able to connect with the old Office 2007 on my Win7 machine on the first try. But for various reasons I prefer to stick to the Spectrum email.

Got the same error message: "Cannot find the server." etc.

What is the exact error message?

Also, please post your Troubleshooting Information. At the top right of the Thunderbird window, click the menu button ≡, then select Help > Troubleshooting Information. Press the "Copy text to clipboard button" and paste the information into your reply.

Thanks for your assistance! the error message is: "Thunderbird failed to find the settings for your email account." Here is the info There is a long string of letters for CMS profile, which I had to remove because they put me over the character limit. I will send those in a separate response.

Application Basics

  Name: Thunderbird
  Version: 147.0.2
  Build ID: 20260213203952
  Distribution ID:

  Update Channel: release
  User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:147.0) Gecko/20100101 Thunderbird/147.0.2
  OS: Windows_NT 10.0 26200
  OS Theme:

  Launcher Process: Enabled
  Multiprocess Windows: 0/0
  Fission Windows: 0/0
            Enabled by default
  Remote Processes: 3
  Enterprise Policies: Inactive
  Google Location Service Key: Missing
  Google Safebrowsing Key: Missing
  Mozilla Location Service Key: Missing
  Safe Mode: true
  Memory Size (RAM): 31.7 GB
  Disk Space Available: 810 GB

Mail and News Accounts

Libraries

    Library
    Status
    Expected minimum version
    Version in use
    Path

      RNP (OpenPGP)
      OK
      0.17.1
      0.17.1.MZLA.147.0.2.botan
      C:\Program Files\Mozilla Thunderbird\rnp.dll

      OTR
      Failed to load. OTR chat encryption will not work.
      -
      -
      -

Calendar Settings

  Home

    Name
    Value

    Name:
    Type: storage
    Disabled: true
    Username:
    URI:
    Refresh Interval:
    Read-only:
    Suppress Alarms:
    Cache Enabled:
    iMIP Identity:
    iMIP Disabled:
    iMIP Account:
    Organizer Id:
    Force Email Scheduling:
    Popup Alarms Supported:
    Alarms on Invitation Supported:
    Max Alarms Per Event:
    Attachment Supported:
    Max Categories:
    Privacy State Supported:
    Priority Supported: true
    Event Supported:
    Task Supported:
    Local Time Supported:
    UTC/GMT Supported:
    Auto-Scheduling Supported:

Crash Reports for the Last 3 Days

Remote Processes

  Type: Count

    GPU: 1
    Isolated Web Content: 1
    RDD: 1

Add-ons

    Name
    Type
    Version
    Enabled
    Location
    ID

      System theme — auto
      theme
      1.4.2
      true
      app-builtin
      default-theme@mozilla.org

      Dark
      theme
      1.3.2
      false
      app-builtin
      thunderbird-compact-dark@mozilla.org

      Light
      theme
      1.3.2
      false
      app-builtin
      thunderbird-compact-light@mozilla.org

Security Software

  Type: Name

    Antivirus: McAfee
    Antispyware:
    Firewall: McAfee;Windows Firewall

Legacy User Stylesheets

  Active: false
  Stylesheets: No stylesheets found

Graphics

    Features
    Compositing: WebRender (Software)
    Font Visibility Debug Info: Windows Platform
    Asynchronous Pan/Zoom: wheel input enabled; touch input enabled; scrollbar drag enabled; keyboard enabled; autoscroll enabled; smooth pinch-zoom enabled
    WebGL 1 Driver WSI Info: -
    WebGL 1 Driver Renderer: WebGL is currently disabled.
    WebGL 1 Driver Version: -
    WebGL 1 Driver Extensions: -
    WebGL 1 Extensions: -
    WebGL 2 Driver WSI Info: -
    WebGL 2 Driver Renderer: WebGL is currently disabled.
    WebGL 2 Driver Version: -
    WebGL 2 Driver Extensions: -
    WebGL 2 Extensions: -
    Target Frame Rate: 60
    DirectWrite: true (10.0.26100.7824)

    GPU #1
    Active: Yes
    Description: Intel(R) Iris(R) Xe Graphics
    Vendor ID: 0x8086
    Device ID: 0xa7a1
    Driver Version: 32.0.101.7077
    Driver Date: 9-16-2025
    Drivers: igdumdim64 igd10iumd64 igd10iumd64 igd12umd64 igdumdim32 igd10iumd32 igd10iumd32 igd12umd32
    Subsys ID: 0d771028
    RAM: 0

    GPU #2
    Active: No
    RAM: 0

    Diagnostics
    AzureCanvasBackend: skia
    AzureCanvasBackend (UI Process): skia
    AzureContentBackend: skia
    AzureContentBackend (UI Process): skia
    AzureFallbackCanvasBackend (UI Process): skia
    CMSOutputProfile: 
    Display0: 1920x1080@60Hz scales:1.000000|1.250000
    DisplayCount: 1
    HardwareStretching: both=1 window-only=0 full-screen-only=0 none=0 error=0
    GPUProcessPid: 22708
    Window Device Pixel Ratios: 1.25
    ClearType Parameters: Gamma: 1.8 Pixel Structure: RGB ClearType Level: 100 Enhanced Contrast: 50
    Font Visibility Debug Info: Windows Platform
    WebGPU Default Adapter: [object Object]
    WebGPU Fallback Adapter: [object Object]

    Decision Log
    HW_COMPOSITING: available by defaultblocked by runtime: Acceleration blocked by safe-mode
    D3D11_COMPOSITING: unavailable by default: Hardware compositing is disabled
    D3D11_HW_ANGLE: unavailable by default: D3D11 compositing is disableddisabled by env: D3D11 compositing is disabled
    GPU_PROCESS: available by default
    WEBRENDER: available by defaultunavailable-in-safe-mode by runtime: Safe-mode is enabled
    WEBRENDER_COMPOSITOR: available by defaultunavailable by runtime: No DirectComposition usage
    WEBRENDER_PARTIAL: available by default
    WEBRENDER_SHADER_CACHE: available by defaultunavailable by runtime: WebRender disabled
    WEBRENDER_OPTIMIZED_SHADERS: available by defaultunavailable by runtime: WebRender disabled
    WEBRENDER_ANGLE: available by defaultunavailable-no-angle by runtime: ANGLE is disabled
    WEBRENDER_DCOMP_PRESENT: available by defaultunavailable by runtime: Requires ANGLE
    WEBRENDER_SCISSORED_CACHE_CLEARS: available by defaultblocklisted by env: Blocklisted by gfxInfo
    WEBGPU: available by default
    WINDOW_OCCLUSION: available by default
    HARDWARE_VIDEO_DECODING: available by defaultunavailable by runtime: Requires texture sharing
    HARDWARE_VIDEO_ENCODING: available by defaultunavailable by runtime: Requires

CMS output 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

Thunderbird failed to find the settings for your email account.

When Thunderbird cannot find the server settings for your account use manual account setup. For TWC/Spectrum there seem to be a lot of different server settings, so this is a little bit trial and error.

Try these for manual setup. Also turn of the experimental Account Hub in case it is enabled in your TB Settings: At the top right of the Thunderbird window, click the menu button ≡ > Account Settings > Settings > General > Account Hub Un-check 'Create accounts in the new Account Hub'

For the incoming server: Server type: IMAP Server name: mail.twc.com Connection security: SSL/TLS Port: 993 Authentication method: Normal password

For the outgoing server: Server type: SMTP Server name: mail.twc.com Connection security: SSL/TLS Port: 465 Authentication method: Normal password

If these won't work also see https://www.roadrunneremail-rr.com/time-warner-cable-twc-imap-pop3-smtp-email-settings https://support.mozilla.org/en-US/questions/1161629 https://support.mozilla.org/en-US/questions/1297771

Another potential problem:

Antivirus: McAfee

McAfee has been problematic in connection with Thunderbird in the past. If you're still running into problems try to start Windows 11 in safe mode with networking enabled. Does the problem go away?

Windows safe mode disables anti-virus software. This is a troubleshooting step, not a solution.

Thank you for being willing to put in the time and effort to find a solution. I tried the settings you suggested and also uninstalled McAfee to be sure it was not an issue. Same error: "Thunderbird failed to find the settings for your email account."

Are you using manual account setup? https://support.mozilla.org/kb/manual-account-configuration

yes, and i double-checked everything before hitting Test.