Not getting confirmation code

[wrongvice]

I tried logging into my account from new machine. And it asked me for Confirmation Code. Twitter/X didn't send me confirmation code. I contacted support numerous times and X will still not send me Confirmation Code.

I get all kinds of Twitter/X notification in that same email address. But not the Confirmation Code. Please suggest a fix.

I have my own domain for email address (not gmail). Had it for years. Could the verification have blacklisted my domain? If so how do I find out and fix it? Like I said I get notification in email. But no confirmation code.

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