Hi Huangbin

We are using the iredmail for quite a long time and it is working fine.
However, currently, we faced an issue where legitimate sender from Gmail was being greylisted and being bounced.
But, due to security concerns, we cannot whitelist the whole of Gmail as there are also tons of scam / phishing emails sent to us via Gmail.

Currently, the software is able to help us to block these scam / phishing emails sent to us via Gmail but at the same time it also block legitimate Gmail emails.

The current workaround solution is to whitelist individual sender email address. Is there any permanent solution which allows to resolve this issue where it knows to differentiate between legitimate Gmail and scam / phishing Gmail?
Thanks.

Regards
Wai Hong