Problem
What are the IP Addresses used by outMail?
Solution
IP addresses for the Outmail clusters are listed here for reference - however, the canonical list is those listed in the DNS TXT record spf.smtp-engine.com
- 87.106.145.58
- 87.106.169.232
- 87.106.189.53
- 89.106.178.4
- 209.143.135.163
- 212.227.20.70
- 212.227.20.69
- 212.227.22.82
- 212.227.22.199
- 212.227.86.52
- 217.160.92.157
- 2001:8d8:968:7d00::19:7e53
- 2001:8d8:968:9c00::87:3b06
These are subject to change without notice - and may not actually be up to date.
For SPF use, please use the SPF record as detailed in the article on setting up SPF