The general answer is that you can not check if an email address exists event if you ... This is only true when using gmail's SMTP server to send email. ... <看更多>

Check if an email address exists without sending any email, written in Rust. ... SMTP server validation, Can the mail exchanger of the email address domain ... ... <看更多>

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Email Address Validation: validates if a string contains a valid email. ... Used primarily for checking the existence of a catch-all address ... ... <看更多>