‘550 Invalid HELO Name’ Outloook

In this tutorial, we will show you how to fix the “550 Invalid HELO name” error in Outlook.

1. From the Menu Bar, select Tools then Click E-mail Accounts
2. Click “View or change existing e-mail accounts” then Select “Next“
3. Click your Email account and select “Change“
4. Select “More settings“
5. Click the “Outgoing Server” tab
6. Check the box beside “My outgoing server (SMTP) requires authentication“
7. Select “Use same settings as my incoming email server“
8. Click Ok, Next and then Finish.

Now you will not get this error anymore.