==== Required information ====
- iRedMail version (check /etc/iredmail-release):
- Linux/BSD distribution name and version:
- Store mail accounts in which backend (LDAP/MySQL/PGSQL):
- Web server (Apache or Nginx):
- Manage mail accounts with iRedAdmin-Pro?
- Related log if you're reporting an issue:
====

One of our users cannot receive mail from a sending organization - postfix log indicates "Recipient address rejected: Blacklisted;"

Have added the address and IP to whitelist but this issue is still occuring.

How do we resolve??