diff --git a/docs/logging.md b/docs/logging.md
index c0c948c..3bfba41 100644
--- a/docs/logging.md
+++ b/docs/logging.md
@@ -67,22 +67,6 @@ run the 'run' files in the ./ and ./log directories. Any log entries
 emitted will get handled per the instructions in log/run. The default
 location specified in log/run is log/main/current.
 
-## logging via 'warn'
-
-Any warnings emitted are sent to logging plugins with a deafult log level of
-LOGWARN.  Warnings can be sent to plugins with a different log level using a
-prefix.  For example:
-
-`warn 'NOTICE: Danger Will Robinson!'`
-
-Emitting this warning in a plugin is equivalent to using log():
-
-`$self->log(LOGNOTICE, 'Danger Will Robinson!')`
-
-Notably, using 'warn' in a plugin will always result in that warning being
-emitted to STDERR when the test suite is executed, wheras messages sent with
-log() are not output to the terminal when running the test suite.
-
 ## plugin loglevel
 
 Most plugins support a loglevel argument after their config/plugins entry.
diff --git a/lib/Qpsmtpd.pm b/lib/Qpsmtpd.pm
index 1847659..39363b6 100644
--- a/lib/Qpsmtpd.pm
+++ b/lib/Qpsmtpd.pm
@@ -93,25 +93,6 @@ sub log {
     $self->varlog($trace, join(" ", @log));
 }
 
-sub warn_handler {
-    my $self = shift;
-    $self->log( $self->warn_level(@_) );
-}
-
-sub warn_level {
-    my ( $self, @warnings ) = @_;
-    my @levels = ( keys %Qpsmtpd::Constants::log_levels,
-                   qw[ LOGWARNING LOGCRITICAL LOGEMERGENCY ] );
-    my $levels = join '|', map { s/^LOG//; $_ } @levels;
-    my $prefix;
-    $prefix = $1 if $warnings[0] =~ s/^($levels):\s*//;
-    $prefix = 'WARN'  if ! $prefix;
-    $prefix = 'WARN'  if $prefix eq 'WARNING';
-    $prefix = 'CRIT'  if $prefix eq 'CRITICAL';
-    $prefix = 'EMERG' if $prefix eq 'EMERGENCY';
-    return log_level("LOG$prefix"), @warnings;
-}
-
 sub varlog {
     my ($self, $trace) = (shift, shift);
     my ($hook, $plugin, @log);
diff --git a/lib/Qpsmtpd/Constants.pm b/lib/Qpsmtpd/Constants.pm
index ba317d8..0c9dec7 100644
--- a/lib/Qpsmtpd/Constants.pm
+++ b/lib/Qpsmtpd/Constants.pm
@@ -3,7 +3,7 @@ use strict;
 require Exporter;
 
 # log levels
-our %log_levels = (
+my %log_levels = (
                   LOGDEBUG  => 7,
                   LOGINFO   => 6,
                   LOGNOTICE => 5,
@@ -54,7 +54,7 @@ sub return_code {
 sub log_level {
     my $test = shift;
     if ($test =~ /^\d+$/) {    # need to return the textural form
-        foreach (sort keys %log_levels) {
+        foreach (keys %log_levels) {
             return $_ if $log_levels{$_} =~ /$test/;
         }
     }
diff --git a/qpsmtpd b/qpsmtpd
index 3675829..9a3d75b 100755
--- a/qpsmtpd
+++ b/qpsmtpd
@@ -17,7 +17,6 @@ delete $ENV{ENV};
 $ENV{PATH} = '/bin:/usr/bin:/var/qmail/bin';
 
 my $qpsmtpd = Qpsmtpd::TcpServer->new();
-$SIG{__WARN__} = sub { $qpsmtpd->warn_handler(@_) };
 $qpsmtpd->load_plugins();
 $qpsmtpd->start_connection();
 $qpsmtpd->run(\*STDIN);    # pass the "socket" like -prefork/-forkserver
diff --git a/qpsmtpd-forkserver b/qpsmtpd-forkserver
index b83839b..7cf8982 100755
--- a/qpsmtpd-forkserver
+++ b/qpsmtpd-forkserver
@@ -180,7 +180,6 @@ if ($PID_FILE) {
 
 # Load plugins here
 my $qpsmtpd = Qpsmtpd::TcpServer->new();
-$SIG{__WARN__} = sub { $qpsmtpd->warn_handler(@_) };
 
 # Drop privileges
 my (undef, undef, $quid, $qgid) = getpwnam $USER
diff --git a/qpsmtpd-prefork b/qpsmtpd-prefork
index 3b15116..42784d3 100755
--- a/qpsmtpd-prefork
+++ b/qpsmtpd-prefork
@@ -290,7 +290,6 @@ sub run {
 
     # setup qpsmtpd_instance
     $qpsmtpd = qpsmtpd_instance();
-    $SIG{__WARN__} = sub { $qpsmtpd->warn_handler(@_) };
 
     if ($detach) {
         open STDIN,  '/dev/null'  or die "/dev/null: $!";
diff --git a/t/qpsmtpd.t b/t/qpsmtpd.t
index b2e0ba1..308f821 100644
--- a/t/qpsmtpd.t
+++ b/t/qpsmtpd.t
@@ -45,8 +45,6 @@ __load_logging();
 __config_dir();
 __config();
 
-__warn_level();
-
 done_testing();
 
 sub __run_hooks {
@@ -344,30 +342,6 @@ sub __config {
     $qp->unfake_hook($_) for qw( config user_config );
 }
 
-sub __warn_level {
-    my ( $level, $msg ) = $qp->warn_level('qwerty');
-    is( log_level($level), 'LOGWARN', 'Correct log level with no prefix' );
-    is( $msg, 'qwerty', 'Correct message with no prefix' );
-
-    my $s = 'abc123';
-    $s =~ /(abc)/;
-    ( $level, $msg ) = $qp->warn_level('dvorak');
-    is( log_level($level), 'LOGWARN', 'Correct level after $1 assignment' );
-    is( $msg, 'dvorak', 'Correct message with no prefix after $1 assignment' );
-
-    ( $level, $msg ) = $qp->warn_level('NOTICE:   asdf');
-    is( log_level($level), 'LOGNOTICE', 'Correct level with NOTICE prefix' );
-    is( $msg, 'asdf', 'Correct message with NOTICE prefix' );
-
-    ( $level, $msg ) = $qp->warn_level('EMERGENCY:foo');
-    is( log_level($level), 'LOGEMERG', 'Correct level with EMERGENCY prefix' );
-    is( $msg, 'foo', 'Correct message with EMERGENCY prefix' );
-
-    ( $level, $msg ) = $qp->warn_level('NOTICE != LOGNOTICE');
-    is( log_level($level), 'LOGWARN', 'Correct level with no colon' );
-    is( $msg, 'NOTICE != LOGNOTICE', 'Correct message with no colon' );
-}
-
 1;
 
 package FakeAddress;