[otrs] Problem with autoresponse (Field from in blank)

Hello, The OTRS received the ticket by PostmasterPOP3.pl very well, but wen the aplication sends the autoresponse, the field from (Mail From) is blank, for ex: Connection with server SMTP is : Mail From:<> This field is refused by SMTP server, because is blank RCPT TO: In the Config.pm http://config.pm/ $Self->{'SendmailModule'} = 'Kernel::System::Email::SMTP'; $Self->{'SendmailModule::Host'} = ' x.x.x.x'; Wen i send mail by web front-end the otrs sends with the mail of queue. The error occur only the feature outoresponse. In the version 1.31 the otrs sends mail from: That is a bug or there is a configuration where i can force this?