Once Nagios was setup on the little Minecraft server, it needed to be configured to send email. These days I prefer to relay through one of my Google Apps accounts, so I set forth to setup GMail as a relay using Postfix, which was already installed, but not really doing anything. Using Postfix always seems to be an issue with me, since I have more experience with Sendmail. However, having done this recently on a few Macs, I figured what the heck.
Here’s a quick overview of the process:
sudo dpkg-reconfigure postfix
# cd /etc/postfix/certs # /usr/lib/ssl/misc/CA.pl -newca # openssl genrsa -out itchy.key 1024 # openssl req -new -key itchy.key -out itchy.csr # openssl ca -out itchy.pem -infiles itchy.csr
relayhost = [smtp.gmail.com]:587 #auth smtp_sasl_auth_enable=yes smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd #tls smtp_use_tls = yes smtp_sasl_security_options = noanonymous smtp_sasl_tls_security_options = noanonymous smtp_tls_note_starttls_offer = yes tls_random_source = dev:/dev/urandom smtp_tls_scert_verifydepth = 5 smtp_tls_key_file=/etc/postfix/certs/itchy.key smtp_tls_cert_file=/etc/postfix/certs/itchy.pem smtpd_tls_ask_ccert = yes smtpd_tls_req_ccert =no smtp_tls_enforce_peername = no
gmail-smtp.l.google.com user@gmail.com:password smtp.gmail.com user@gmail.com:password
postmap /etc/postfix/sasl_passwd
/etc/init.d/postfix reload
https://help.ubuntu.com/community/Postfix
http://ubuntulinux.co.in/blog/ubuntu/set-up-postfix-for-relaying-emails-via-gmail-smtp-server/
http://bookmarks.honewatson.com/2008/04/20/postfix-gmail-smtp-relay/
Jay Everson has over 20 years experience supporting production infrastructure and software R&D Labs. He has 12+ years experience in management and has also spent time in Software Engineer, Infrastructure Architect and Team Lead roles.