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I used this one : https://www.digitalocean.com/community/tutorials/how-to-install-and-setup-postfix-on-ubuntu-14-04
Should I be using another? What I would like is to have php be able to send mail to customers and wordpress to be able to email out passwords and such.
Thanks
@yorkdigitalsolutions - You have both sendmail and postfix installed and active. You need to disable sendmail for postfix to work.