Why does antispam set the header "TS_MSG_REP_50"?

Question

Computer networks

Please help.
One mail service defines my letters as spam.
Accordingly, my letters do not reach the addressee.
Emails are valid, NOT spam, DKIM and SFP are configured and valid.
Here are the enemy antispam headers
--
X-NAI-Spam-Flag: YES
X-NAI-Spam-Level: ***
X-NAI-Spam-Threshold: 3
X-NAI-Spam-Score: 3.5
X-NAI-Spam- Report: 4 Rules triggered
* 2.4 -- TS_MSG_REP_50
* 1 -- FROM_3WRDS_LC_4D
* 0.1 -- RCVD_BAD_SIP
* 0 -- RV4911
--
This rule "TS_MSG_REP_50" has the highest weight.
Maybe someone knows what this spam trap is, and what exactly this rule means?
I want to understand why this enraged robot suddenly began to consider my mail as spam.
I tried to google by exact match "TS_MSG_REP_50" - neither Google nor Yandex know anything.

Answer 1

Looks like this is not an anti-spam server. It looks like mcaffe antispam, maybe the tool sits where the client's thread in outlook is which locks you. Try to send a thread to someone else from this domain.

Answer 2

As I understand it, this is really antispam from McAfee.
Unfortunately, I never used it, but according to the whole logic of events, we are talking about Trust Source Reputation. Those. there are troubles with the reputation of the IP address of the sender.
Read the link below, I hope it helps
https://kc.mcafee.com/corporate/index?page=content...