When the mail server removes a blacklisted IP address, what appears in the mail server log as a reason?

I'm trying to find the reason for the constant flow of error messages in the mail error log.

"March 28 10:29:51 auth: error: od (lindsay,,): check in clear: the search failed for the user: Lindsay"

For the above error, the IP address is on everyone's blacklist. In the mail configuration, I activated blacklist filtering checked, entered "zen.spamhaus.org". The user "Lindsay" is a valid user although not being a current employee (his email account is transferred to another employee).

Does blacklist filtering reject this message?

OS 10.12.6, server 5.3.1