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sub auth { ... require Authen::SASL; } or \$self->set_status(500, ["Need MIME::Base64 and Authen::SASL +todo auth"]), return 0;
#!/use/bin/perl ... Net::SMTP=GLOB(0x1b0b964)>>> QUIT Net::SMTP=GLOB(0x1b0b964)<<< 221 <smtp.host.com>