Phishing Scams - Detection by Verizon Email Servers

[chickdoc]

Verizon posts under Support / Announcements a number of notices about phishing scams that appear to be emails from Verizon.  Why can't the email servers detect these bogus emails and either block them at the server from making it to the user's accounts, or appending "POTENTIAL SCAM" to the email subject header.

[tns2]

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@chickdoc wrote:

Verizon posts under Support / Announcements a number of notices about phishing scams that appear to be emails from Verizon.  Why can't the email servers detect these bogus emails and either block them at the server from making it to the user's accounts, or appending "POTENTIAL SCAM" to the email subject header.

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I am sure that the actual original example shown are blocked, but the spammers keep find ways of disguising them so new version keep coming through.  Usually includes some pointers to servers they keep changing.