The current list of IP ranges that Luminate Online uses for outbound mail are:
- 220.127.116.11/25 (Transactional email)
- 18.104.22.168/25 (Transactional email)
- 22.214.171.124/27 (Bulk/campaign email)
- 126.96.36.199/27 (Bulk/campaign email)
- 188.8.131.52/27 (Bulk/campaign email)
- 184.108.40.206/27 (Bulk/campaign email)
Luminate Online attaches the domain outboundmail.convio.net to the outbound IP addresses that are used. If you have the option to whitelist a sender domain, whitelisting outboundmail.convio.net will allow the delivery.
Note, these IPs are in CIDR notation. For information on CIDR, see this Wikipedia page.