Yahoo Mail does not have any dedicated antivirus software, but it partners up with Norton to scan your emails to avoid phishing emails. This option is only applicable to web-based Antivirus Yahoo Mails. If you are using an email client instead of the web-based email service, the email program becomes vulnerable to threats and infects your PC with malware, spyware, and ransomware. To protect your device from this problem, many email client users attempt to install antivirus software for email protection. Sometimes, the mail protection activated on your antivirus software might block the incoming and outgoing emails. To avoid this problem, you can disable the mail protection feature temporarily. To check whether you have phishing emails on your Yahoo mailbox, follow the steps mentioned below.
Follow the below-mentioned steps to check if you are attaching a malicious file to your Yahoo Mail: