Wynik:

$ tail -F /var/log/mail.log | ./pmail.corp
Lp.    Data                Temat                                   Od                                   Do
====== =================== ======================================= ==================================== ===================================
    1. 2023-01-04 00:57:12 Re: Obowiązek wprowadzenia standardów   poczta@dydaktyka.corp                serwis@bogus.home
                           ochrony małoletnich w szkołach i
                           przedszkolach – informacja
------ ------------------- --------------------------------------- ------------------------------------ -----------------------------------
[...]
------ ------------------- --------------------------------------- ------------------------------------ -----------------------------------
 1163. 2023-01-04 17:11:30 Funkcjonowanie arc? hiwum               kontakt@eibweb.corp                  ele123@bogus.home
                           zakładowego/?  składnicy akt dla?
                           początkujących
------ ------------------- --------------------------------------- ------------------------------------ -----------------------------------
 1164. 2023-01-04 17:17:08 [ESP] Urzędowe Poświadczenie Odbioru    ceidg-noreply@ceidg.gov.corp         elzbieta.golka@bogus.home
------ ------------------- --------------------------------------- ------------------------------------ -----------------------------------
 1165. 2023-01-04 17:21:45 ZALANIE - PODTOPIENIE - POŻAR -         info@eforumb2b.corp                  agnieszka.wakosz@bogus.home
                           Dodatkowe środki na remont
------ ------------------- --------------------------------------- ------------------------------------ -----------------------------------
 1166. 2023-01-04 17:31:15 👤 Kalina Elżbie? ta Bilda to now? a     friendsuggestion@facebookmail.com    ireneusz.grzebinski@bogus.home
                           propozycja zn? ajomości dla Ci? ebie

Skrypt:

#!/usr/bin/perl
#
# tail -F /var/log/mail.log | ./pmail.corp
#
# cd /var/log/syslogs/2023/02
# find ./{01..15} -iname '*mail*' -exec zgrep <PATTERN> {} \; | ~/pmail.corp
#

use utf8;
use open ':std', ':encoding(UTF-8)';

use Time::Piece;
use Encode;

my $time = localtime;

#$: = " @.";

sub trim { return $_[0] =~ s/^\s+|\s+$//rg; }

format =
^>>>>> ^<<<<<<<<<<<<<<<<<< ^<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<~~ ^<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<~~ ^<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<~~
$i,    $dt,                $subject,                               $from,                               $to
------ ------------------- --------------------------------------- ------------------------------------ -----------------------------------
.

#format STDOUT_TOP =
#Mail Report (page @#)
#                  $%

$= = 9999;

format STDOUT_TOP =

Lp.    Data                Temat                                   Od                                   Do
====== =================== ======================================= ==================================== ===================================
.


$idx = 0;
while (<>) {
    if (/^(... .. ........) .*warning: header Subject: (.*) from .*; from=<([^>]+)>.*to=<([^>]+)>/) {
        $i = ++$idx . '.';
        $d = Time::Piece->strptime("$1", "%b %d %H:%M:%S");
        #$dt = $d->strftime("%m-%d %T");
        $dt = $time->year . '-' . $d->strftime("%m-%d %T");
        #$subject = $2;
        $subject = decode("MIME-Header",$2);
        $from = $3;
        $to = $4;
        #printf("%-14s %-42s %-30s %s
",$dt,$subject,$from,$to);
        write();
    }
}