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216.73.216.182
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smtp1-ext.dfw1.corp.rackspace.com
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216.73.216.182
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smtp1-ext.dfw1.corp.rackspace.com
SPF record
Queried
just now
DNS resolution error
Querying SPF record for smtp1-ext.dfw1.corp.rackspace.com failed.
check TXT records