[SOLVED] Backend ERROR: OTRS-CGI-10 Perl: 5.10.1 OS:

[kmdot]

I get this error when sending email as reply

Backend ERROR: OTRS-CGI-10 Perl: 5.10.1 OS: linux Time: Thu Dec 23 14:35:03 2010

Message: Can't use from 'otrs@localhost': Could't set FROM: 550 5.7.1 Client does not have permissions to send as this sender
at /opt/otrs//Kernel/System/Email/SMTPTLS.pm line 130
!

Traceback (13951):
Module: Kernel::System::Email::SMTPTLS::Send (v1.2) Line: 132
Module: Kernel::System::Email::Send (v1.70) Line: 682
Module: Kernel::System::Ticket::Article::ArticleSend (v1.266) Line: 2031
Module: Kernel::Modules::AgentTicketEmail::Run (v1.160) Line: 947
Module: Kernel::System::Web::InterfaceAgent::Run (v1.58) Line: 838
Module: ModPerl::ROOT::ModPerl::Registry::opt_otrs_bin_cgi_2dbin_index_2epl::handler (unknown version) Line: 48
Module: (eval) (v1.88) Line: 204
Module: ModPerl::RegistryCooker::run (v1.88) Line: 204
Module: ModPerl::RegistryCooker::default_handler (v1.88) Line: 170
Module: ModPerl::Registry::handler (v1.99) Line: 31

thanks

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NEEDED TO ADD TO POSTMASTER ACCOUNT

exchange 2007