PLANERGY has experienced some email delivery issues and as a short term fix we have changed our email server. For most accounts this will have helped resolve the problem.
If you or your suppliers are still experiencing problems with emails delivering you/they can whitelist the IP of the new email server:
69.64.57.12
If you have previously whitelisted our email server you should not remove the whitelist for this because it will be reinstated as a sending server in the near future. The IP for this is:
80.86.90.202
Other tips to improve email delivery are available here