An email virus is malicious software that spreads through email attachments or embedded links. Even attachments from trusted senders, or files that appear to be non-executable formats such as images or audio, can harbor viruses. Relying solely on an email client's preview feature is insufficient to verify safety; scanning all attachments with antivirus software regardless of source or file type is essential.

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• 2011h23tokubetsu #65電子メールを介したウイルスの被害に遭わないために注意すべきこととして，適切なものだけをすべて挙げたものはどれか。 a 信用できる人からの電子メールであっても，添…