Usage of the verb 'confirm'

[Daemon99]

Is it grammatically correct to use the verb 'confirm' like in the sentence below?

"Can you please confirm if whatever you've sent in your email is correct?"

I've heard of confirm being used in sentences like, "Please confirm your details"
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Non-native speaker of English
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I intend to live forever - so far, so good.

[Mister Micawber]

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This is OK:

Can you please confirm that whatever you've sent in your email is correct?
.
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Native English teacher at Mister Micawber's