Agent can’t receive notofication :

            Thu Feb 4 20:07:30 2016        error   OTRS-CGI-43 Module Kernel/System/LinkObject/Person.pm not in @INC (/opt/otrs/Custom /opt/otrs/Kernel/cpan-lib /opt/otrs/ /etc/perl /usr/local/lib/perl/5.14.2 /usr/local/share/perl/5.14.2 /usr/lib/perl5 /usr/share/perl5 /usr/lib/perl/5.14 /usr/share/perl/5.14 /usr/local/lib/site_perl . /etc/apache2)

Thu Feb 4 20:07:30 2016        error   OTRS-CGI-43 Linktype 'Customer' does not exist!

Thu Feb 4 20:07:30 2016        error   OTRS-CGI-43 Linktype 'Agent' does not exist!

Thu Feb 4 20:06:15 2016         error   OTRS-CGI-43 Module Kernel/System/LinkObject/Person.pm not in @INC (/opt/otrs/Custom /opt/otrs/Kernel/cpan-lib /opt/otrs/ /etc/perl /usr/local/lib/perl/5.14.2 /usr/local/share/perl/5.14.2 /usr/lib/perl5 /usr/share/perl5 /usr/lib/perl/5.14 /usr/share/perl/5.14 /usr/local/lib/site_perl . /etc/apache2)

Thu Feb 4 20:06:15 2016         error   OTRS-CGI-43 Linktype 'Customer' does not exist!

Thu Feb 4 20:06:15 2016         error   OTRS-CGI-43 Linktype 'Agent' does not exist!

Thu Feb 4 20:06:04 2016        error   OTRS-CGI-43 Module Kernel/System/LinkObject/Person.pm not in @INC (/opt/otrs/Custom /opt/otrs/Kernel/cpan-lib /opt/otrs/ /etc/perl /usr/local/lib/perl/5.14.2 /usr/local/share/perl/5.14.2 /usr/lib/perl5 /usr/share/perl5 /usr/lib/perl/5.14 /usr/share/perl/5.14 /usr/local/lib/site_perl . /etc/apache2)

Thu Feb 4 20:06:04 2016        error   OTRS-CGI-43 Linktype 'Customer' does not exist!

Thu Feb 4 20:06:04 2016        error   OTRS-CGI-43 Linktype 'Agent' does not exist!

Thu Feb 4 20:05:48 2016        error   OTRS-CGI-43 Linktype 'Customer' does not exist!

Thu Feb 4 20:05:48 2016        error   OTRS-CGI-43 Linktype 'Agent' does not exist!

Thu Feb 4 19:59:54 2016         error   OTRS-CGI-43             'CloseTicketCustomer' notification could not be sent to customer 'nfplacide@gmail.com

Thu Feb 4 19:59:54 2016         error   OTRS-CGI-43 Impossible to send message to: nfplacide@gmail.com .

Thu Feb 4 19:59:54 2016         error   OTRS-CGI-43 Can't send message: 550Start mail input; end with <CRLF>.<CRLF>

Thu Feb 4 19:09:06 2016         error   OTRS-CGI-43             'CloseTicketCustomer' notification could not be sent to customer 'p.njami@gelgh.com

Thu Feb 4 19:09:06 2016         error   OTRS-CGI-43 Need MimeType!

Thu Feb 4 19:06:34 2016         error   OTRS-CGI-43 Need Name!

Thu Feb 4 19:03:46 2016         error   OTRS-CGI-43             'CloseTicketCustomer' notification could not be sent to customer 'nfplacide@gmail.com

Thu Feb 4 19:03:46 2016         error   OTRS-CGI-43 Need MimeType!

Thu Feb 4 19:02:13 2016         error   OTRS-CGI-43 Impossible to send message to: nfplacide@gmail.com .

Thu Feb 4 19:02:13 2016         error   OTRS-CGI-43 Can't send message: 550Start mail input; end with <CRLF>.<CRLF>

Thu Feb 4 18:51:19 2016          error   OTRS-otrs.Console.pl-Maint::PostMaster::MailAccountFetch-43      'Ticket create notification' notification could not be sent to agent 'd.appiah@gelgh.com

Thu Feb 4 18:51:19 2016          error   OTRS-otrs.Console.pl-Maint::PostMaster::MailAccountFetch-43      Can't send message: 550Start mail input; end with <CRLF>.<CRLF>

Thu Feb 4 18:51:17 2016          error   OTRS-otrs.Console.pl-Maint::PostMaster::MailAccountFetch-43      'Ticket create notification' notification could not be sent to agent 'e.ofori@gelgh.com

Regards,