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6 Top 10 ways to evaluate IP warming 1. SenderScore: One universally accepted method that ISPs use to determine the inbox-worthiness of an IP address is to look at SenderScore over a 30-day moving window. This means that establishing and then maintaining a posi ve score a er the ini al IP warm-up period are both equally important. Visit www.SenderScore.org to create a free basic account and start tracking your score. 2. Hard Bounce Rates: Hard bounce rates are the only rates that count toward your sender reputa on. They should not exceed 3%, and these addresses should be added to your master exclude list immediately as they are undeliverable. Review the error codes to get a clearer picture of the reasons for your Hard Bounces. For more informa on on bounceback error codes, take a look at these ar cles from Go Daddy and Symantec. 3. Spam & Abuse Complaints: For any par cular email, it is normal to receive a handful of complaints. Monitor the complaints, and if you see a spike, be sure to inves gate the issue and correct the cause. 4. Delivery Rate Trends: This is one of the most important trends to monitor. If 97 to 100% of emails are usually delivered according to your reports, and you see a sudden drop, you need to inves gate. You may need to drop back your sending volume for a day or two to see if this helps. 5. Open Rates: Open rates should have established averages. Are your daily reports mee ng or bea ng your expected range? How can you encourage more opens with your subject lines? 6. Clickthrough Rates: Are your clickthrough rates consistent with your history? Do you no ce any spikes up or down? Can you improve them with a single, strong and clear CTA? What about using a CTA bu on rather than a text? 7. Click-to-Open Rates: Do people open your emails but are not inspired to take ac on? How can you mo vate or inspire them? Can you visually simplify? Is there too much to read? Is there one heading, one CTA, one image and can you glance and know what you'll get if you click? 8. Unsubscribe Rates: This rate is cri cal and should not exceed 2%. If it is high, consider possible reasons. Are your contacts not expec ng your email? Is the content relevant? Have you emailed them infrequently in the past resul ng in their low engagement? Did they perhaps forget they signed up for your emails? Try using a subscrip on preference center so they can opt-down rather than out. 9. Monitor Delivery Trends (Deliverability %, Bounce Rates, Unsubscribes): If you have established a general trend for these measurements, you want to improve them incrementally and watch for any sudden changes in any direc on. Nega ve changes could indicate a problem with your IP warming campaign. 10. Compare rela ve posi ve to nega ve signals: Signals are rela ve to each other to a degree. If your list is very engaged and some people unsubscribe, bounce regularly at a low rate, or mark you as spam from me to me, don't sweat it. BUT… if you have a low engagement rate in addi on to spam complaints or hard bounces spike, that tells another story. FAQS ON IP BLOCKING

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