How does DNS hosting location affect delivery speed?

Geographic DNS considerations:

Single location DNS:

Fast for nearby queries

Slow for distant queries

Single point of failure

Distributed DNS (anycast):

Servers worldwide respond to nearest querier

Faster lookups globally

Better redundancy

Email impact:

Receivers worldwide query your DNS

Faster responses = faster authentication

More reliable = fewer timeout issues

Major providers: Cloudflare, Route53, Google Cloud DNS all use global anycast networks.

For global email sending, use DNS with worldwide distribution.

Harbor offices in every major port city provide faster manifest verification globally.