What email send time optimization is#
Send time optimization chooses when to deliver each message, either by segment (time zone, historical engagement windows) or per recipient using predicted open behavior.
Why it matters#
Arriving when a person is actually checking mail lifts engagement, and engagement lifts reputation.
What Klaviyo handles#
Most platforms, including Klaviyo, generate the records or settings you need under a domain authentication or sending settings page, and expose bounce and complaint data in reports. Confirm the exact location in Klaviyo's current documentation.
What you still own#
- Capture time zone at signup or infer from engagement.
- Analyze past click timestamps by segment.
- Use your platform's per-recipient optimization if available.
- Spread large sends over hours to avoid rate limiting.
Common mistakes#
- Sending everything at 9 a.m. in your own time zone.
- Blasting the full list in one minute and tripping provider throttles.
Frequently asked questions#
What is the best time to send marketing emails?
There is no universal answer; mid-morning local time performs well for many B2B lists, but your own data beats benchmarks.
Does Klaviyo set up email send time optimization automatically?
Klaviyo provides the values and some checks, but publishing DNS, aligning domains, and monitoring results remain your responsibility.