Reading this thread post, I just checked my server, and I can see this:
Exim statistics from 2025-02-15 00:28:27 to 2025-02-15 21:21:44
Grand total summary
-------------------
At least one address
TOTAL Volume Messages Addresses Hosts Delayed Failed
Received 19KB 5 2 4 80.0% 4 80.0%
Delivered 9210 2 2 1
Rejects 2167 43
Temp Rejects 2 1
Deliveries by transport
-----------------------
Volume Messages
dovecot_virtual_delivery 9210 2
Top 50 mail rejection reasons by message count
----------------------------------------------
Messages Mail rejection reason
202 Rejected RCPT: Sender verify failed
**1900 Rejected RCPT: Rejected because 19 IPs are in a black list at spamhaus**
41 Dropped: too many syntax or protocol errors
**19 Rejected RCPT: Rejected because 19 IPs are in a black list at zen.spamhaus.org**
6 Dropped: too many unrecognized commands
1 Rejected MAIL: Helo name contains an IP address (HELO was 177.237.197.116.unknown.m1.com.sg) and not is valid
1 Rejected RCPT: relay not permitted
I sent test emails just now, and those are the 2 delivered ones showing above in summary.
Rest rejection reasons, and where they are stored or what they mean, I would like to understand as well in non-technical terms, if possible please.
The 1900 & 19 lines are edited by me, as those are the total it showed for me (100 * 19 lines).