Do DNS propagation delays affect real-time sending?

Myth: DNS propagation delays cause immediate problems with email sending.

Reality: Cached records continue working during propagation.

How caching helps:

Old records remain valid until TTL expires

Most receivers use cached data

Sending continues normally

When propagation matters:

Emergency changes needing immediate effect

Fixing broken authentication urgently

New sending service needing authorization

Planning strategy:

Lower TTL before planned changes

Make changes during low-volume periods

Allow propagation time before relying on new records

Propagation is usually seamless. Plan for it when timing matters.

Old schedules remain valid until they expire. New instructions phase in gradually.