Overview

If you are experiencing a 500 Host not found (Winsock error #11001) when sending an email directly from System Five.  Follow these solution articles to resolve.

Solutions 1 Check your email configuration

If this error happens for some users in your network and not others.  Email configuration needs to be specific.  Configuration of the "Internet" tab of the users having the error is the likely solution.  Misentered information will cause the email to fail to send.  See this solution article for more detailed instructions on setup.

• Incorrect port mistypes such as smtp.outlook.com:578 instead of smtp.outlook.com:587
• Incorrect smtp server names such as [email protected]:587 instead of smtp.outlook.com:587
• Ensure you have "Use SSL" if using port 587 for encryption.
• Avoid using SMTP port 25 as many internet providers and 3rd party email hosting companies no longer allow relay on this port.
• 

Solutions 2 Check your IP has not been blacklisted or blocked (Technical)

If all users in your network are no longer able to send email.  This article requires technical networking understanding and all steps have not been detailed. 

• Use the tool https://www.whatismyip.com/ to get your public IP address on the workstation or server having the issues.
• Use the tool https://mxtoolbox.com/blacklists.aspx to check the IP address of the server has been blacklisted.  
• If this is your own on-premise network
  • Contact your internet provider for assistance in getting a different IP address.
  • Check your firewall is not been updated and blocking the traffic from leaving your network.
  • Contact your email hosting provider and ensure they are not blocking your email messages.
• If you are hosting in our System Five on Cloud.  
  • If our cloud operations team has recently restarted your server for remediation, you may have gotten an IP address that can cause this experience. 
  • Work with Windward support to get a fixed IP address enabled for your environment.