Hi

I see things working as designed so far, as in the appender gets called

#!/usr/bin/perl --
use strict;
use warnings;

use Log::Log4perl 1.49;

my $logger ;
sub bye { $logger->info("bye"); }
{
    my $logconfig = <<'__LOGCONFIG__';
log4perl.rootLogger = ALL, First, Mailer
log4perl.appender.First = Log::Log4perl::Appender::Screen
log4perl.appender.First.layout = SimpleLayout
log4perl.appender.Mailer         = FakeMailSend
log4perl.appender.Mailer.to      = FakeMailSend@example.com
log4perl.appender.Mailer.subject = FakeMailSend
log4perl.appender.Mailer.layout  = SimpleLayout
# log4perl.appender.Mailer.buffered = 0
__LOGCONFIG__
    
    Log::Log4perl::init( \$logconfig );
    $logger = Log::Log4perl->get_logger;
    $logger->debug('debug');
    $logger->info('info');
    $logger->warn('warn');
    $logger->error('error');
    $logger->trace('trace');
    $logger->fatal('fatal');
    bye;
}
exit( 0 );


BEGIN {
    package FakeMailSend;
    use Log::Dispatch::Email::MailSend qw[];
    use base qw( Log::Dispatch::Email::MailSend );
    sub send_email {
        warn "@_\n";
    }
    1;
}
__END__
DEBUG - debug
INFO - info
WARN - warn
ERROR - error
TRACE - trace
FATAL - fatal
INFO - bye
FakeMailSend=HASH(0xe33e14) message DEBUG - debug
INFO - info
WARN - warn
ERROR - error
TRACE - trace
FATAL - fatal
INFO - bye
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But if I actually try sending the mail (rename my sub send_mail)

Can't locate object method "open" via package "Mail::Mailer::smtp" at 
+lib/Mail/Send.pm line 58 during global destruction.
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Without buffering its  Died at site/lib/Mail/Mailer.pm line 158. for every attempt.

An explicit  undef $logger ; produces the same good result

Adding  use Mail::Mailer::smtp(); produces the same failure to send the mail to example :)  No such file or directory at site/lib/Mail/Mailer.pm line 158 during global destruction.

as without buffering  No such file or directory at site/lib/Mail/Mailer.pm line 158.

Trying to  require Mail::Mailer::smtp; from within send_email fails as before  Can't locate object method "open" via package "Mail::Mailer::smtp"

So, Mail::Mailer::smtp can't be loaded during global destruction. Does Email::... eventually use it? Not important :)

So, if using a global for convenience, solution is

END {
    undef $logger ;
}
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