Description
Mailprotector uses thirty-two servers to send outbound email, also called "otransports." Occasionally, an IP address can be blacklisted as a spam source or a user complaint will damage the IP addresses' reputation. The list below is the IP address for each of the thirty-two servers.
An IP address can be taken out of service by DevOps if a reputation problem is identified. Once the reputation problem has been resolved, DevOps will place the IP address back into service.
NOTE: In some cases, repair of an IP addresses' reputation requires continued email delivery even though the receiving system may rate-limit or delay the emails, such as Microsoft's free email domains (hotmail.com, outlook.com, live.com, and msn.com). In these cases, the IP is moved to a staging server to deliver 1% of outbound email or less.
Transport Server IP Addresses:
| otransport-1 | 52.1.23.3 |
| otransport-2 | 52.1.140.110 |
| otransport-3 | 52.1.182.179 |
| otransport-4 | 54.84.14.167 |
| otransport-5 | 54.84.246.51 |
| otransport-6 | 54.152.160.215 |
| otransport-7 | 52.22.79.245 |
| otransport-8 | 52.20.59.36 |
| otransport-9 | 52.0.21.132 |
| otransport-10 | 52.22.72.116 |
| otransport-11 | 52.3.94.45 |
| otransport-12 | 52.1.62.31 |
| otransport-13 | 54.208.239.9 |
| otransport-14 | 54.172.220.45 |
| otransport-15 | 18.204.234.187 |
| otransport-16 | 18.232.37.98 |
| otransport-17 | 52.1.21.150 |
| otransport-18 | 52.5.166.138 |
| otransport-19 | 54.164.123.4 |
| otransport-20 | 54.164.131.225 |
| otransport-21 | 54.173.10.57 |
| otransport-22 | 34.194.188.63 |
| otransport-23 | 18.214.85.87 |
| otransport-24 | 107.23.53.12 |
| otransport-25 | 35.153.239.198 |
| otransport-26 | 3.209.199.18 |
| otransport-27 | 35.169.41.199 |
| otransport-28 | 52.7.80.136 |
| otransport-29 | 34.237.235.151 |
| otransport-30 | 3.209.239.254 |
| otransport-31 | 54.236.173.181 |
| otransport-32 | 35.168.124.141 |
Transport Server Host Names:
Outbound transport servers have a hostname syntax as expressed below:
otransport-X.outbound.emailservice.io
Reverse DNS records are:
otransport-X.outbound.emailsrv.net
Transport Server IP List (for easy copy & paste)
52.1.23.3, 52.1.140.110, 52.7.80.136, 52.1.182.179, 54.84.14.167, 54.84.246.51, 54.152.160.215, 52.22.79.245, 52.20.59.36, 52.0.21.132, 52.22.72.116, 52.3.94.45, 52.1.62.31, 54.208.239.9, 54.172.220.45, 18.204.234.187, 18.232.37.98, 52.1.21.150, 52.5.166.138, 54.164.123.4, 54.164.131.225, 54.173.10.57, 34.194.188.63, 18.214.85.87, 107.23.53.12, 35.153.239.198, 3.209.199.18, 35.169.41.199, 34.237.235.151, 3.209.239.254, 54.236.173.181, 35.168.124.141
Bracket Export/Journaling IP Addresses:
| Bracket 1 | 3.23.175.127 |
| Bracket 2 | 18.223.48.82 |
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