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my power bill is not spam

my power bill is not spam

my power bill is not spam

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Hi Gordon, are you having this problem in Thunderbird -- Mozilla's stand-alone email program -- or on your email website that you access using Firefox?

For Thunderbird, see: Thunderbird and Junk / Spam Messages

For webmail sites, you need to find the site's method for determining what is spam, there isn't a Firefox feature for that.