Error 554 5.1.8

Error 554 5.1.8

Hello.

As many in the forums, I have been hit with the "Unable to send message;Reason:554 5.1.8 Sender Address Blocked". Even with a 1mb filesize, this is an issue.

Zoho is awesome and works well, however for "unlimited" service, they seem pretty limited. Can an admin please raise my domain send/receive limit since I am a business and get over 100 emails a day from all emails. You guys promised that quality of service when I signed up, so I expect it now.

Thank you so much.

Domains are:
  • *@wolfboytech.org
  • *@ohioiproject.co.uk
  • *@transcendnetwork.co.uk