Glossary Term
IP Reputation
The reputation score assigned to the IP address used to send your emails.
What is IP Reputation?
IP reputation is the trustworthiness score assigned to the specific IP address (or range of IP addresses) from which your emails are sent. When you use an email service like Microsoft 365, you typically share IP addresses with other users.
There are two models:
- Shared IP: Your emails are sent from IPs used by many customers. Reputation is collective.
- Dedicated IP: Your emails come from an IP used only by you. Reputation is yours alone.
For most cold email operations, shared IPs (like Microsoft 365's) work fine because domain reputation is more important. However, extremely high-volume senders may benefit from dedicated IPs with careful warmup.
Why It Matters
- 1One of several factors affecting deliverability
- 2Less important than domain reputation for most cold email
- 3Shared IPs can be affected by other users' behavior
- 4Major email providers weight domain reputation higher than IP
Related Tools
Related Guides
Related Terms
Sender Reputation
A score assigned to your email-sending identity based on your historical sending behavior and recipient engagement.
Domain Reputation
The reputation score assigned specifically to your sending domain, affecting all mailboxes on that domain.
Email Deliverability
The ability of your emails to successfully reach recipients' inboxes rather than being blocked or sent to spam.
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