Function check_if_email_exists::smtp::check_smtp

pub async fn check_smtp<'_, '_, '_, '_>(
    to_email: &'_ EmailAddress, 
    host: &'_ Name, 
    port: u16, 
    domain: &'_ str, 
    input: &'_ CheckEmailInput
) -> Result<SmtpDetails, SmtpError>

Get all email details we can from one single EmailAddress.