Do You know any handy postfix mailserver commands or scripts for managing it? Please kindly share these. Im pasting ones that can be handy

Watch postfix log:
tail -f -n100 /var/log/maillog

stop postfix:
Code:
service postfix stop
stop postfix
See the sizes of the Postfix folders
Code:
du -h /var/spool/postfix --max-depth=1
Postfix mail queue sumary:
Code:
mailq
or
Code:
sendmail -bp
or
postqueue -p
see some message details
postcat -qv 3BC371BAD02D6

try to deliver queued emails:
Code:
postfix -f
remove deferred mails:
Code:
postsuper -d ALL deferred;postsuper -d ALL defer
remove all mails from postfix queue:
Code:
postsuper -d ALL
Thanks to following perl script (postfix-delete.pl) delete mails from some domain.tld or contianing some word
Code:
#!/usr/bin/perl

$REGEXP = shift || die "no email-adress given (regexp-style, e.g. bl.*\@yahoo.com)!";

@data = qx</usr/sbin/postqueue -p>;
for (@data) {
  if (/^(\w+)(\*|\!)?\s/) {
     $queue_id = $1;
  }
  if($queue_id) {
    if (/$REGEXP/i) {
      $Q{$queue_id} = 1;
      $queue_id = "";
    }
  }
}

#open(POSTSUPER,"|cat") || die "couldn't open postsuper" ;
open(POSTSUPER,"|/usr/sbin/postsuper -d -") || die "couldn't open postsuper" ;

foreach (keys %Q) {
  print POSTSUPER "$_\n";
};
close(POSTSUPER);
delete mails containing domain.com
Code:
./postfix-delete.pl spamdomain.com
delete mails containing lottery
Code:
./postfix-delete.pl lottery
How to identiffy source of spam on Postfix mailserver: http://unix.stackexchange.com/a/121548