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216.73.216.59
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smtp1.bt.com
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216.73.216.59
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smtp1.bt.com
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213.121.34.171
British Telecommunications
AS2856
United Kingdom
London, England
213.121.34.172
British Telecommunications
AS2856
United Kingdom
London, England
213.121.34.174
British Telecommunications
AS2856
United Kingdom
London, England
62.172.48.78
British Telecommunications
AS2856
United Kingdom
London, England
62.172.48.79
British Telecommunications
AS2856
United Kingdom
London, England
62.172.48.80
British Telecommunications
AS2856
United Kingdom
London, England
AAAA
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smtp1.bt.com has no AAAA records.