The connection to the server was interrupted.

Problem: In Microsoft Outlook, there is an error message "The connection to the server was interrupted. If this problem continues, contact your server administrator or Internet service provider"

The e-mail account settings were incorrectly written.

Tools -Email Accounts -

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Note: Although there might be two (or more) accounts, the error will appear even though other accounts are correct, and error might appear as if it matters and depends on all of them.