some of keywords:groundwater management optimization vulnerability simulationāoptimization hydroeconomic models multiagent systems done so far sudo koha-email-enable entrolibrary ou seem to have gone at it in the wrong order :-) The first thing to setup and tested is the MTA (postfix in your case). Install the mailutils package and check if you can send out emails from the command line using the mail command. Hint: If the above does not make sense google up "using postfix as a gmail smarthost". There are plenty of tutorials available that should get you past this hurdle. Second: the "enable less secure app" is *NOT* for your recipients. It is for *you*, specifically for the gmail account you are trying to send out email from. Third: send this gmail address as your library's email address in your library details under Administration in Koha. Once you have these in place, only then you should be moving to koha-email-enable. I hope you have replaced [libraryname] with your actual library instance name when which you setup in the koha-create step. BTW, if you name your instance correctly, on invoking koha-email-enabled, it should show you "email enabled for <your_instance_name>". If you make a mistake, it will tell you "Unknown instance". For an already enabled instance it will show that email is already enabled. So "nothing happens" does not sound too good to me. Once your have successfully navigated past this point, and your emails are still not getting sent out, then check the mail log file for possible errors. along with ensuring that your cron jobs are running that typically send out the generated emails every 15 mins or so (based on your cronjob config). # Debian specific: Specifying a file name will cause the first # line of that file to be used as the name. The Debian default # is /etc/mailname. #myorigin = /etc/mailname smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu) biff = no # appending .domain is the MUA's job. append_dot_mydomain = no # Uncomment the next line to generate "delayed mail" warnings #delay_warning_time = 4h readme_directory = no relayhost = smtp.serv.cgnet.com smtp_sasl_auth_enable = yes smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd smtp_sasl_security_options = noanonymous smtp_tls_CAfile = /etc/postfix/cacert.pem smtp_use_tls = yes myorigin = /etc/mailname mydestination = cgnet.com mailbox_size_limit = 0 recipient_delimiter = + inet_interfaces = all inet_protocols = ipv4 default_transport = smtp relay_transport = smtp mynetworks = 127.0.0.0/8 sudo apt-get install postfix Done. /etc/aliases does not exist, creating it. Postfix was not set up. Start with cp /usr/share/postfix/main.cf.debian /etc/postfix/main.cf . If you need to make changes, edit /etc/postfix/main.cf (and others) as needed. To view Postfix configuration values, see postconf(1). After modifying main.cf, be sure to run '/etc/init.d/postfix reload'. Processing triggers for libc-bin (2.23-0ubuntu10) ... Processing triggers for systemd (229-4ubuntu21.10) ... Processing triggers for ureadahead (0.100.0-19) ... Processing triggers for ufw (0.35-0ubuntu2) . sudo cp /usr/share/postfix/main.cf.debian /etc/postfix/main.cf sudo apt-get install libsasl2-2 apt-get install libsasl2-modules sudo apt-get install ca-certificates all were installed before I don't know how? swebshet@koha:~$ sudo nano /etc/postfix/main.cf swebshet@koha:~$ sudo nano /etc/postfix/sasl_passwd swebshet@koha:~$ sudo nano /etc/postfix/sasl_passwd swebshet@koha:~$ sudo chmod 400 /etc/postfix/sasl_passwd swebshet@koha:~$ sudo postmap /etc/postfix/sasl_passwd swebshet@koha:~$ sudo postalias hash:/etc/aliases swebshet@koha:~$ cat /etc/ssl/certs/Equifax_Secure_CA.pem >>/etc/postfix/cacert.pem -bash: /etc/postfix/cacert.pem: Permission denied swebshet@koha:~$ sudo cat /etc/ssl/certs/Equifax_Secure_CA.pem >>/etc/postfix/cacert.pem -bash: /etc/postfix/cacert.pem: Permission denied swebshet@koha:~$ sudo cat /etc/ssl/certs/Equifax_Secure_CA.pem >>/etc/postfix/cacert.pem -bash: /etc/postfix/cacert.pem: Permission denied swebshet@koha:~$ sudo su root@koha:/home/swebshet# cd root@koha:~# cat /etc/ssl/certs/Equifax_Secure_CA.pem >>/etc/postfix/cacert.pem cat: /etc/ssl/certs/Equifax_Secure_CA.pem: No such file or directory root@koha:~# cat /etc/ssl/certs/thawte_Primary_Root_CA.pem >> /etc/postfix/cacert.pem overdue notice reqired cheked yes Check box onnl for the following. Item due- Advance notice 2 Item check-in-- Item checkout-- KohaAdminEmailAddress (modified) to swebashet@gmail.com Entro_Library_librarian 1 overdue notice on the first tab 2 second and 3 for 3 red Koha--> Tools --> Notices & Slips. Go to this section CirculationODUEOverdue Notice root@koha:/usr/share/koha/bin/cronjobs# ./process_message_queue.pl OKay sudo koha-rebuild-zebra entrolibrary okay sudo koha-shell entrolibrary ./process_message_queue.pl works fine This works for locale export LANGUAGE=en_US.UTF-8 swebshet@koha:~$ export LC_ALL=en_US.UTF-8 swebshet@koha:~$ export LANG=en_US.UTF-8 swebshet@koha:~$ export LC_TYPE=en_US.UTF-8 swebshet@koha:~$ sudo koha-shell entrolibrary