Sender reputation is the score that mailbox providers assign to your sending domain and IP address, based on how recipients react to your mail. A strong reputation gets you to the inbox; a poor one sends you to spam or gets you blocked. It is the single biggest factor in email deliverability.
What shapes it
Complaint rates, bounce rates, spam-trap hits, authentication (SPF, DKIM, DMARC), sending consistency, and engagement (opens and clicks) all feed your reputation. Both your domain and your IP carry a reputation — see how IP reputation affects delivery.
How to protect it
Authenticate your domain, mail only engaged opt-in contacts, remove hard bounces, warm up new IPs gradually, and keep complaints low. Mailpro's IP reputation management and authenticated infrastructure do much of this for you. Read the full email deliverability guide.
Why it matters
You can write perfect emails, but if your reputation is poor they never get seen. Related: sender score, deliverability, and email blacklist.
Mailpro and sender reputation
Build a reputation that lands in the inbox
Authenticated sending, IP reputation management, and clean-list tools keep your domain trusted — so your emails actually get seen.