208.80.122.156
redirection.constellix.com
208.80.122.51
redirection.constellix.com
208.80.123.111
redirection.constellix.com
208.80.123.147
redirection.constellix.com

2600:1803:10a::25
2600:1803:10b::1e
2600:1803:10c::45
2600:1803:10d::3d

us-smtp-inbound-1.mimecast.com.
us-smtp-inbound-2.mimecast.com.