==== REQUIRED BASIC INFO OF YOUR IREDMAIL SERVER ====
- iRedMail version (check /etc/iredmail-release): Latest
- Deployed with iRedMail Easy or the downloadable installer?
- Linux/BSD distribution name and version: Ubuntu 16.04
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): MySql
- Web server (Apache or Nginx): Nginx
- Manage mail accounts with iRedAdmin-Pro?
- [IMPORTANT] Related original log or error message is required if you're experiencing an issue.
====

I defined with iRedAPD blacklisted domain:
@oneamour.com

But still getting emails like this:
donotreply@mailfier.com; on behalf of; Oneamour <notifications@oneamour.com>

Should I define it differently?

Thanks,
Mirob