smtp03.mail.provider.nl
smtp03.mail.provider.nl has no DNS entries . The authorative whois server for the top level domain 'nl' is whois.domain-registry.nl
DNS Records 
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Whois for provider.nl
From server whois.domain-registry.nl 6 days, 13 hours ago (None):
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