Definition
IP ranges are contiguous blocks of addresses used by providers for outbound sending, and receivers evaluate the reputation of these ranges.
For senders, understanding ranges matters because SPF can authorise them and reputation can be shared across them.
IP ranges matter because receivers evaluate reputation at range level, not just per address. Knowing which ranges send for you helps you interpret data and manage risk. SPF records often authorise entire ranges.
How Ranges Affect Reputation
Receivers build reputation for IPs and the ranges they belong to.
Shared ranges carry shared risk.
Why It Matters
IP ranges matter because receivers evaluate reputation at range level. Knowing which ranges send for you helps you manage risk.
Best Practices
- Know which IP ranges your provider uses for your sends.
- Verify that your SPF records cover your sending ranges.
- Monitor range-level reputation in your deliverability tools.
- Keep SPF records accurate for every range that sends for your domain.
- Ask your ESP about range reputation before switching.
- Consider a dedicated IP when shared-range reputation limits volume.
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Frequently Asked Questions
A block of IP addresses owned by a sending provider and used to transmit email. IP ranges matter because receivers evaluate reputation at range level, not just per address.
Receivers evaluate ranges as well as individual IPs. Knowing which ranges send for you helps you interpret data and manage risk.
Check the SPF record or ask your ESP. SPF records often authorise entire ranges.
Only by owning infrastructure or purchasing dedicated IPs. IP ranges matter because receivers evaluate reputation at range level, not just per address.
Yes, to a degree. Knowing which ranges send for you helps you interpret data and manage risk.