
a web service by Extreme Messaging
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Checks the address against all the relevant RFCs
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Extreme Messaging works with the postmasters of large domains to allow us to
check the additional, domain-specific, rules that they apply.
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Check the top-level domain (e.g. 'edu') to quickly catch many typos
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Check the host name against relevant RFCs
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Perform DNS lookups for MX, A, and, when necessary, NS records
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Cache DNS results for good performance
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Correct common errors in top-level domains
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Correct common mistakes in large domains
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Correct addresses when domains change names
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Validate street addresses and zip codes to ensure a second contact method for
users
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the phone number given is for a valid country code
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area code given is valid for the country
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subscriber portion follows all country-specific numbering rules
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card number is a legal card number for the card type (e.g. Visa) provided
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Remove bad addresses to save money on delivery costs
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Correct common mistakes to increase the number of good addresses on your list,
increasing its value
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Alert users to errors so they can correct them before you lose the opportunity
to get a correction
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