==== REQUIRED BASIC INFO OF YOUR IREDMAIL SERVER ====
- iRedMail version (check /etc/iredmail-release):  1.3.2
- Deployed with iRedMail Easy or the downloadable installer?
- Linux/BSD distribution name and version: Ubuntu 18.04
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): mysql
- Web server (Apache or Nginx): nginx
- Manage mail accounts with iRedAdmin-Pro? non-pro
- [IMPORTANT] Related original log or error message is required if you're experiencing an issue.
====

Good morning Guys,

I am getting the below error even after doing the below steps:

1. /etc/postfix/helo_access.pcre
      /\.sendersdomain\com$/ OK
2. /opt/iRedAPD-4.6/tools
      python3 wblist_admin.py --add --whitelist @.senderscomain.com
3. In Iredapd database:
     insert into greylisting_whitelist_domains(id,domain) values (47, 'sendersdomain.com');
4. restarted all the services

----Error-----------
bit postfix/smtpd[12076]: NOQUEUE: reject: RCPT from unknown[xxx.xxx.xxx.xxx]: 450 4.7.25 Client host rejected: cannot find your hostname, [xxx.xxx.xxx.xxx]; from=<sender.email.address.com> to=<my.iredmailuser.email.address.com> proto=ESMTP helo=<PZTHOPPS01.senderemailaddress.com>

I know this error was answered/fix already here in the forum but it seems that the above fix doesn't solve my issue.

Thanks,
JunG