IP Addresses to Whitelist
Our server IP addresses are updated from time to time to subscribe here to receive a list of the most up-to-date IPs and be notified of future changes.
https://lp.sparkshipping.com/ip-addresses
Some vendors only accept connections from approved IP addresses. For example, BlueStar and McDonald ATV ask you to have them whitelist Spark Shipping's IP addresses before the connection will work.