Always verify the sender's actual email address (the "From" field).

"HxCore.ol" usually isn't a standalone package name on its own, but rather a reference to the core OpenLayers externs or a specific wrapper library (like hxopenlayers or similar) used within Haxe.

When you send an email using the Windows 10/11 Mail App or Microsoft Outlook for Mac, the application generates a standardized header layout. If a recipient hits "Show Original" or inspects the raw email metadata, they will see a field formatted like this:

Are these emails being blocked by an or external recipients ?

| Solution | Implementation Steps | | :--- | :--- | | | 1. Open the Microsoft Outlook app on your Mac. 2. Go to the Help menu in the menu bar. 3. Select Check for Updates . 4. Install any available updates and restart your Mac. | | Modify Your Sending Method | 1. Access your Gmail settings by clicking the gear icon. 2. Go to "See all settings" > "Accounts and Import" or "Accounts". 3. Under "Send mail as", choose to send through Gmail's servers (smtp.gmail.com) instead of the default Outlook option. | | Temporarily Use Gmail's Web Interface | 1. Open your preferred web browser. 2. Navigate to Gmail ( mail.google.com ). 3. Log in and send the critical email directly from the browser-based interface. 4. This bypasses Outlook for Mac entirely. | | Reinstall Microsoft Outlook on Mac (As a Last Resort) | 1. Quit Microsoft Outlook. 2. Move the Microsoft Outlook app from the Applications folder to the Trash. 3. Restart your Mac. 4. Download the latest installer from the official Microsoft website or the Mac App Store. 5. Reinstall Outlook and set up your account again. |

When you send an email, your computer talks to a mail server. That server adds hidden text called a header to your message.

The specific (e.g., Mimecast, Proofpoint) flagging these messages.