Definition
Email throughput is how many messages a system can send per unit of time. It is a capacity constraint separate from deliverability.
Insufficient throughput delays campaigns and hurts time-sensitive mail.
Throughput determines whether time-sensitive mail arrives on time, so sizing infrastructure for peaks matters. Testing under load reveals real capacity. Separating throughput from reputation keeps the two concerns clear.
Managing Throughput
Size your infrastructure to meet peak send needs.
Test throughput under load before big campaigns.
Why It Matters
Throughput determines whether time-sensitive mail arrives on time. Understanding it helps you size infrastructure for peaks.
Best Practices
- Size your infrastructure to meet peak send needs.
- Test throughput under load before big campaigns.
- Separate throughput capacity from reputation management.
- Monitor send rates and queues.
- Plan for peaks.
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Related Glossary Terms
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Abuse Complaint
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AI Email Summary
An AI email summary is a short, machine-generated overview of an email's key points, shown by Gmail, Outlook and Apple Mail before a recipient opens the message. It is reshaping how email marketers think about subject lines, preview text and open rates.
ARPU (Average Revenue Per User)
ARPU (Average Revenue Per User) is a metric that measures the average revenue generated per email subscriber over a specific period, used to evaluate list value and campaign effectiveness.
Attention Rate
Attention rate is the percentage of email opens that last longer than 5 seconds, distinguishing genuine reads from passive opens, preview-pane views, or Apple MPP auto-loads.
Average Order Value in Email
Average order value in email is the average amount spent per transaction from recipients who clicked through from an email campaign.
Frequently Asked Questions
The messages-per-time capacity of a sending system. Throughput determines whether time-sensitive mail arrives on time, so sizing infrastructure for peaks matters.
Low throughput can delay sends and miss time-sensitive windows. Testing under load reveals real capacity.
Send benchmarking tests and read provider logs. Separating throughput from reputation keeps the two concerns clear.
No, it is capacity, not placement. Throughput determines whether time-sensitive mail arrives on time, so sizing infrastructure for peaks matters.
Scale infrastructure and pace sends. Testing under load reveals real capacity.