Hi 19Mic,
I can now confirm that I have now removed the IP 178.32.77.130 from our internal Blacklist and I have also reset the confidence of that IP accross all our towers.
Once the one hour propagation time has passed From now. This will fix the isseue and you will no longer get issues sending emails from that IP to our customers.
Please feel free to set this thread as resolved.
Kind regards
Kevin Brosnan
Tier 2 Senior Technical Support Engineer