HTML email: Difference between revisions

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If an email contains inline content from an external server, such as a [[Digital image|picture]],
retrieving it requires a request to that external server which identifies where the picture will be displayed and other information about the recipient. [[web bug|Web bug]]s are specially created images (usually unique for each individual email) intended to track that email and let the creator know that the email has been opened. Among other things, that reveals that an email address is real, and can be targeted in the future.
 
Some phishing attacks rely on particular features of HTML:<ref name=Trend>{{cite web|title=Trend-spotting email techniques: How modern phishing emails hide in plain sight |date=August 18, 2021 |url=https://www.microsoft.com/en-us/security/blog/2021/08/18/trend-spotting-email-techniques-how-modern-phishing-emails-hide-in-plain-sight/ |publisher=Microsoft.com}}</ref>