If you are facing this error while sending emails via Microsoft Outlook.Please Use the following 3 easy steps for complete solution in your Outlook version 2010 or later, We hope this trick will Absolutely solve your issue.
1-Click File > Info > Account Settings
2-Select Account > Change
3-More Settings > Outgoing Server >
Click on “More settings”
• Select “Outgoing Server” Tab
• Check “My outgoing server (SMTP) requires authentication”
• Select “Use same settings as my incoming email server”
• Click OK
• Press Next
• At Last, press Finish
Problem Solved Successfully!
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