CHECK DNS. SEE WHAT RESOLVES.
DNS and Email Articles
Practical explanations of DNS changes, email checks, reverse DNS and IP location in plain English.
PRACTICAL GUIDE
What an email address check can tell you
A valid-looking address is a useful start. Here is how to read format and mail DNS checks without mistaking them for proof of delivery.
Read article →PRACTICAL GUIDEReverse DNS for a mail server: where to start
Find who controls your PTR record, compare it with forward DNS, and understand what a mismatch actually means.
Read article →PRACTICAL GUIDEWhy your IP location may show another city
IP location is an estimate about a network address. Learn why mobile networks, VPNs and provider routing can put the map marker elsewhere.
Read article →PRACTICAL GUIDEA practical checklist before changing DNS
Keep a record of the current setup, plan around cached answers, and check web and mail records after the change.
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