← Glossary
Authentication
What is DNS propagation?
The time it takes for a changed DNS record to be seen by resolvers around the internet.
How it works in practice
Resolvers cache an answer until its TTL expires, so a changed record is visible in some places before others. New records on names nobody has queried are usually visible within minutes; changed records can take as long as the old TTL. Lowering the TTL before a planned change shortens the wait.
The common mistake
Concluding that a record is wrong because one resolver still returns the old value.
Check it yourself
Related terms
Not sure whether this is what's hurting your inbox placement? A free deliverability review finds the real cause.
How we help: Consulting · Private infrastructure · Managed mailboxes · Monthly support