delivery-notification FAILED: temporarily unable to send DSN

[sles]

Hello!

I run ubuntu 16.04 and my logs are filled with :

[127.0.0.1] said: 451 4.5.0 Error in processing, id=26913-17, delivery-notification FAILED: temporarily unable to send DSN to <email address hidden>: 451 4.5.0 From MTA(smtp:[127.0.0.1]:10025) during fwd-data-contents (open body: Invalid argument at /usr/local/share/perl/5.22.1/MIME/Entity.pm line 1878.): id=26913-17 at /usr/sbin/amavisd-new line 15165. (in reply to end of DATA command))

Looks like bug.
Thank you!

[sles (slesru)]

Well, I guess this is bug.
User tries to send not allowed content, but message can't be generated... :-(

Looks like because of this:
http://blogs.perl.org/users/tony_cook/2013/02/perl-io-on-scalars.html

[sles (slesru)]

btw, if attached file with prohibited content is named in UTF-8 (let's say Тест.exe) , then I hit this bug.

[sles (slesru)]

As temporary workaround I changed

# my $IO = $self->open("r") || die "open body: $!";
    my $IO = $self->open("r") || return error "open body: $!";

at /usr/local/share/perl/5.22.1/MIME/Entity.pm line 1878

This results in message (not full , but) generation and no messages stuck in queue..