List Quality Check

You have no lists. To create a list click here

Select Page
Icon

Sender Score

Results for IP address
12.34.56.789

Sending Domain Information

MX Record   
SPF Record   

SSL Information

SSL Certificate
Owner
hbs.edu
Issued by
InCommon RSA Server CA 2
Valid Until
03/07/2026
Sending IPs
IP Address    Hostname Volume    Sender Score   
13.111.103.208 mta.mc.email.hbs.edu. HIGH 99
34.208.229.194 smtp-0308b5f414e98d1c2.core1.sfdc-lywfpd.mta.salesforce.com. VERY HIGH 99
34.223.240.91 smtp-0a26649a6099e1b38.core1.sfdc-lywfpd.mta.salesforce.com. VERY HIGH 99
35.80.100.235 smtp-0afa9223a9ed1fc74.core1.sfdc-lywfpd.mta.salesforce.com. VERY HIGH 99
35.80.210.20 smtp-09c2fcff47e4bcd2e.core1.sfdc-lywfpd.mta.salesforce.com. VERY HIGH 99
40.107.92.91 mail-bn7nam10on2091.outbound.protection.outlook.com. VERY HIGH 58
40.107.92.130 mail-bn7nam10on2130.outbound.protection.outlook.com. VERY HIGH 57
40.107.93.124 mail-dm6nam10on2124.outbound.protection.outlook.com. VERY HIGH 74
40.107.94.101 mail-mw2nam10on2101.outbound.protection.outlook.com. VERY HIGH 63
40.107.94.111 mail-mw2nam10on2111.outbound.protection.outlook.com. VERY HIGH 60
40.107.94.136 mail-mw2nam10on2136.outbound.protection.outlook.com. VERY HIGH 58
40.107.200.125 mail-northcentralusazon11022125.outbound.protection.outlook.com. HIGH 70
40.107.223.94 mail-dm6nam11on2094.outbound.protection.outlook.com. VERY HIGH 74
40.107.223.112 mail-dm6nam11on2112.outbound.protection.outlook.com. VERY HIGH 63
40.107.223.125 mail-dm6nam11on2125.outbound.protection.outlook.com. VERY HIGH 74
40.107.236.128 mail-bn8nam11on2128.outbound.protection.outlook.com. VERY HIGH 60
40.107.237.98 mail-bn8nam12on2098.outbound.protection.outlook.com. VERY HIGH 56
40.107.237.103 mail-bn8nam12on2103.outbound.protection.outlook.com. VERY HIGH 56
40.107.237.127 mail-bn8nam12on2127.outbound.protection.outlook.com. VERY HIGH 67
40.107.237.135 mail-bn8nam12on2135.outbound.protection.outlook.com. VERY HIGH 73
40.107.244.95 mail-mw2nam12on2095.outbound.protection.outlook.com. VERY HIGH 68
40.107.244.104 mail-mw2nam12on2104.outbound.protection.outlook.com. VERY HIGH 61
40.107.244.105 mail-mw2nam12on2105.outbound.protection.outlook.com. VERY HIGH 61
40.107.244.128 mail-mw2nam12on2128.outbound.protection.outlook.com. VERY HIGH 57
44.226.35.195 smtp-0fded09c93ed2d5d4.core1.sfdc-lywfpd.mta.salesforce.com. VERY HIGH 99
44.227.83.50 smtp-0fd2547c5f739e6e3.core1.sfdc-lywfpd.mta.salesforce.com. VERY HIGH 99
44.227.237.13 smtp-0e3fa5fa5492d81fe.core1.sfdc-lywfpd.mta.salesforce.com. VERY HIGH 99
44.228.181.13 smtp-0e8b8d52ecd1cd0a4.core1.sfdc-lywfpd.mta.salesforce.com. VERY HIGH 99
44.229.234.135 smtp-0d9dbcdc6921f4338.core1.sfdc-lywfpd.mta.salesforce.com. VERY HIGH 99
44.230.10.181 smtp-0a95d0409ce604816.core1.sfdc-lywfpd.mta.salesforce.com. VERY HIGH 98
44.231.107.135 smtp-02df9b87ecfdb79b4.core1.sfdc-lywfpd.mta.salesforce.com. VERY HIGH 99
44.236.120.70 smtp-0930306bc42f9baad.core1.sfdc-lywfpd.mta.salesforce.com. VERY HIGH 98
44.236.122.72 smtp-0d61e857409751d78.core1.sfdc-lywfpd.mta.salesforce.com. VERY HIGH 82
44.236.162.208 smtp-0558a15971d8ae189.core1.sfdc-lywfpd.mta.salesforce.com. VERY HIGH 99
44.241.7.229 smtp-035e0b92479dfc3c3.core1.sfdc-lywfpd.mta.salesforce.com. VERY HIGH 98
44.241.228.16 smtp-0f8243330de704b65.core1.sfdc-lywfpd.mta.salesforce.com. VERY HIGH 99
44.242.16.158 smtp-0f750f5da7cef3132.core1.sfdc-lywfpd.mta.salesforce.com. VERY HIGH 99
44.242.90.147 smtp-0a22c5baf75f3cc99.core1.sfdc-lywfpd.mta.salesforce.com. VERY HIGH 99
52.26.146.30 smtp-0a01a156ef6c5ae6c.core1.sfdc-lywfpd.mta.salesforce.com. VERY HIGH 99
52.36.109.75 smtp-04e32c8eef8d03185.core1.sfdc-lywfpd.mta.salesforce.com. VERY HIGH 98
52.39.163.5 smtp-034fdfd2469503a6a.core1.sfdc-lywfpd.mta.salesforce.com. VERY HIGH 99
52.40.82.48 smtp-0f0f6a5e74fe75d22.core1.sfdc-lywfpd.mta.salesforce.com. VERY HIGH 98
52.41.32.238 smtp-09d4540c8080bb8cf.core1.sfdc-lywfpd.mta.salesforce.com. VERY HIGH 99
52.41.242.188 smtp-0af89e7548fc6bcbd.core1.sfdc-lywfpd.mta.salesforce.com. VERY HIGH 99
52.88.22.238 smtp-0414768be3dabe476.core1.sfdc-lywfpd.mta.salesforce.com. VERY HIGH 99
54.68.113.147 smtp-02fda6fa0595b9bd6.core1.sfdc-lywfpd.mta.salesforce.com. VERY HIGH 99
54.149.44.2 smtp-04e36bb844d9cf514.core1.sfdc-lywfpd.mta.salesforce.com. VERY HIGH 99
54.190.17.95 smtp-04b7c6000131b913c.core1.sfdc-lywfpd.mta.salesforce.com. VERY HIGH 99
54.203.12.180 smtp-0980d30f3cd62f25e.core1.sfdc-lywfpd.mta.salesforce.com. VERY HIGH 99
54.203.166.206 smtp-09edc46be26d0eecb.core1.sfdc-lywfpd.mta.salesforce.com. VERY HIGH 99
54.212.59.1 smtp-0e9202e736f6c9e79.core1.sfdc-lywfpd.mta.salesforce.com. VERY HIGH 99
54.218.217.247 smtp-0385a834262849c2b.core1.sfdc-lywfpd.mta.salesforce.com. VERY HIGH 98
64.26.60.153 mx0.mfg.onr.siteprotect.com. VERY HIGH 81
65.254.253.8 walmailout08.yourhostingaccount.com. VERY HIGH 97
98.97.251.41 smtp41.yul1.qemailserver.com. VERY HIGH 95
98.97.251.52 smtp52.yul1.qemailserver.com. VERY HIGH 95
128.103.208.29 ackroyd.harvard.edu. HIGH 99
167.89.13.187 o7.mx.technolutions.net. VERY HIGH 99
167.89.25.12 o3.mx.technolutions.net. VERY HIGH 99
167.89.25.126 o1.mx.technolutions.net. VERY HIGH 98
198.2.181.192 mail192.suw18.rsgsv.net. VERY HIGH 98
198.37.152.133 o9.mx.technolutions.net. VERY HIGH 99
198.37.152.137 o8.mx.technolutions.net. VERY HIGH 97
198.37.152.151 o6.mx.technolutions.net. VERY HIGH 99
198.37.158.230 o4.mx.technolutions.net. VERY HIGH 99
198.37.159.162 o2.mx.technolutions.net. VERY HIGH 97
198.207.147.229 m05b.cvent-planner.com. VERY HIGH 99
198.207.147.230 m06b.cvent-planner.com. VERY HIGH 99
198.207.147.231 m07b.cvent-planner.com. VERY HIGH 98
198.207.147.237 m13b.cvent-planner.com. HIGH 99
198.207.147.238 m14b.cvent-planner.com. HIGH 99
198.245.85.88 mta.hu.harvard.edu. VERY HIGH 98
208.95.132.48 mail2102.harvardcollege.mkt1960.com. MODERATE 99
216.230.14.229 m229c.cvent-planner.com. VERY HIGH 99
216.230.14.230 m230c.cvent-planner.com. VERY HIGH 99
216.230.14.231 m231c.cvent-planner.com. VERY HIGH 99
216.230.14.237 m237c.cvent-planner.com. HIGH 99
216.230.14.238 m238c.cvent-planner.com. HIGH 99

The path to reputation greatness.

See if you’re being blocked.

Is your reputation suffering because you’re on a blocklist? Use our free tool to investigate.

Learn from star senders

Hear real sender stories on the Email After Hours podcast.

Keep your lists clean

Upload your list to our list quality checks tool to see if your contacts are legit.

Talk to an email expert.

We’re the experts in deliverability and driving maximum results from your email marketing. Let’s chat and find out how you can improve your sender reputation and raise your revenue.