One of the most common is phishing attacks.
Phishing attacks werethe most common bang out of cybercrimein 2020, according to the FBI.
Because they act as a proxy, some of these services offer filters that can reduce spam.

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Also, as privacy advocates likePaul Bischoffnote, aliases are a lot easier to change than your email address.
“You don’t get that level of transparency with a normal all-purpose email address.”
Ultimately, email aliases can offer many helpful features.
The important thing to note here is that these solutions aren’t a complete line of defense.