After upgrading to zimbra 8.7.3 there were false positives blacklisting operation.
mail.tsys.kz[220.127.116.11]: 554 5.7.1 Service unavailable; Client host [18.104.22.168] blocked using b.barracudacentral.org;
Feb 22 10:26:04 mail postfix/smtpd: NOQUEUE: reject: RCPT from mxout1.rambler.ru[22.214.171.124]: 554 5.7.1 Service unavailable; Client host [mxout1.rambler.ru] blocked using dbl.spamhaus.org;
the audit showed that IP not in lists.
Discuss your pilot or production implementation with other Zimbra admins or our engineers.
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