pflogsumm.pl is designed to provide an over-view of postfix activity, with just enough detail to give the administrator a "heads up" for potential trouble spots. The following is an over-view of the reports produced:

* Total number of:
o Messages received, delivered, forwarded, deferred, bounced and rejected
o Bytes in messages received and delivered
o Sending and Recipient Hosts/Domains
o Senders and Recipients
o Optional SMTPD totals for number of connections, number of hosts/domains connecting, average connect time and total connect time
* Per-Day Traffic Summary (for multi-day logs)
* Per-Hour Traffic (daily average for multi-day logs)
* Optional Per-Hour and Per-Day SMTPD connection summaries
* Sorted in descending order:
o Recipient Hosts/Domains by message count, including:
+ Number of messages sent to recipient host/domain
+ Number of bytes in messages
+ Number of defers
+ Average delivery delay
+ Maximum delivery delay
o Sending Hosts/Domains by message and byte count
o Optional Hosts/Domains SMTPD connection summary
o Senders by message count
o Recipients by message count
o Senders by message size
o Recipients by message size
with an option to limit these reports to the top nn.
* A Semi-Detailed Summary of:
o Messages deferred
o Messages bounced
o Messages rejected
* Summaries of warnings, fatal errors, and panics
* Summary of master daemon messages
* Optional detail of messages received, sorted by domain, then sender-in-domain, with a list of recipients-per-message.
* Optional output of "mailq" run

Pflogsumm.pl was written using Perl 5.004. As of version 19990413-02, pflogsumm worked with Perl 5.003, but future compatibility is not guaranteed.