[SOLVED] Impossible to send message to: BACKEND ERROR

[alemazz]

Hi, im trying to setup a new OTRS 6 installation on centOS 7, postmaster working but sender email is not working at all, when i try to reply to a ticket and send an email from otrs i got this error msg:

Backend ERROR: OTRS-CGI-66 Perl: 5.16.3 OS: linux Time: Thu Jul 18 10:21:26 2019

Message: Impossible to send message to: myemail <myemail@myemail.com> .

RemoteAddress: x.x.x.x
RequestURI: /otrs/index.pl

Traceback (15229):
Module: Kernel::System::Ticket::Article::Backend::Email::ArticleSend Line: 299
Module: Kernel::Modules::AgentTicketCompose::Run Line: 986
Module: Kernel::System::Web::InterfaceAgent::Run Line: 1116
Module: ModPerl::ROOT::ModPerl::Registry::opt_otrs_bin_cgi_2dbin_index_2epl::handler Line: 38
Module: (eval) (v1.99) Line: 207
Module: ModPerl::RegistryCooker::run (v1.99) Line: 207
Module: ModPerl::RegistryCooker::default_handler (v1.99) Line: 173
Module: ModPerl::Registry::handler (v1.99) Line: 32

Insiede OTRS logs i found these things:

Impossible to send message to: myemail <myemail@myemail.com> .
Thu Jul 18 12:21:26 2019 (Europe/Rome) error OTRS-CGI-66 Error while queueing email to 'myemail@myemail.com from 'otrs@localhost'. Subject => 'Re: [Ticket#2019071866000046] Test 2';
Thu Jul 18 12:21:26 2019 (Europe/Rome) error OTRS-CGI-66 CommunicationLog(ID:23,AccountType:-,AccountID:-,Direction:Outgoing,Transport:Email,ObjectLogType:Message,ObjectLogID:26)::Kernel::System::Email => Errors occurred during message sending: Error while queueing email to 'myemail@myemail.com' from 'otrs@localhost'. Subject => 'Re: [Ticket#2019071866000046] Test 2';
Thu Jul 18 12:21:26 2019 (Europe/Rome) error OTRS-CGI-66 CommunicationLog(ID:23,AccountType:-,AccountID:-,Direction:Outgoing,Transport:Email,ObjectLogType:Message,ObjectLogID:26)::Kernel::System::MailQueue => Invalid email address Sender - otrs@localhost: invalid otrs@localhost (Invalid syntax)!

(btw myemail@myemail.com its just an example)

If some1 could help me to set up emails in the right way or to solve my problem i would appreciate a lot.
Thanks!

Edit: Solved changing emails in queues and Sendmail module.

[kropek]

Invalid email address Sender otrs@localhost
change sender