If you get this message while you are logged on to the company network from a company computer station, you should inform your IT section. Most companies allow internal computers to send messages to computers outside of the network. If YOU are using a private computer, not normally part of the company network, you may be denied the ability to route your messages through your company SMTP server when the recipient of the message is also outside the company network. You will have to use an alternate SMTP mail server like gmail to send your messages. TB-38.3 Win10-PC