Outlook is a free, personal email service from Microsoft where you can configure with your email address and keep connected across your devices with powerful organizational tool.
But, many times if not configured properly you can face problems in sending or receiving of mails.
For any case you get an error of mails not sending to recipient and getting an error of “451-Server Error” then, there are few settings you should take care of in your outlook configuration.
Follow certain steps which can solve your problem:
Open your outlook configured with your account.
Go to files tab in the menu and select and select “Account setting”.
Step 3: On clicking the Account setting the following window occours on the screen.
Now, click the change tab under email.
Now the POP and IMAP account setting will be opened.
Now click on more settings on the window.
On the new window select the outgoing server. Tick the check box with “use same setting as my incoming server” as shown below.
Click ok and save your settings.
Now you have your required settings done on your outlook.