Hi brothers. A program of mine contains the following section : 
...
        MIME::Lite->send(
            'smtp' => $args->{'smtp'},
            'AuthUser' => $uid,
            'AuthPass' => $args->{'smtppw'}
        );
...

[download]
This has worked fine for a couple of years, under perl 5.8.8. This last week-end, the host was upgraded from Debian Linux "Etch" to "Lenny", and at the same time perl went from 5.8.8 to 5.10.0. As a result, the same program now crashes with the following error :

2011/05/12-11:40:25 error SMTP auth() command failed: 5.5.4 Syntax: AUTH mechanism

Does that ring a bell to anyone ? I tried to follow the chain of what happens, and track it down to this section of MIME::Lite : 
    my $smtp = MIME::Lite::SMTP->new( $hostname, %opts )
      or Carp::croak "SMTP Failed to connect to mail server: $!\n";

    # Possibly authenticate
    if ( defined $args{AuthUser} and defined $args{AuthPass}
         and !$args{NoAuth} )
    {
        if ($smtp->supports('AUTH',500,["Command unknown: 'AUTH'"])) {
            $smtp->auth( $args{AuthUser}, $args{AuthPass} )
                or die "SMTP auth() command failed: $!\n"
                   . $smtp->message . "\n";
        } else {
            die "SMTP auth() command not supported on $hostname\n";
        }
    }

[download]
and gather that MIME::Lite::SMTP->new() itself boils down to a Net::SMTP->new(), but then I get hopelessly lost, because that is definitely wizard code from Graham Barr and such, leading further to Authen::SASL and lots of references to globs (or vice-versa, my head spins).

Anyway, my basic question is : this worked fine for years with perl 5.8.8, the mail server has not changed, my program has not changed, so any clue about what is happening here ?

In reply to SMTP "auth" problem after upgrade by soliplaya

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