Hey everyone. I want to install and configure Postfix to relay off of a mail server that already exists in my datacenter. The relay does not require authentication and all the guides that I have fo... [by ykket]
I installed postfix on a bare bones Ubuntu Server 12.04 by typing the following in the terminal.
sudo apt-get install postfix
When asked to choose a mail server configuration type, I chose Satellite system. For the System mail name, I entered ww1.example.com and for the SMTP relay host, I selected mail.example.com. Note that I replaced example.com with my own domain.
I have a postfix mail server that should relay all outgoing mail to an Exchange 2010 server (the Exchange box is my smarthost). I have administrator access to the Exchange 2010 system, but I'm not very familiar with it.
I have been at this for a couple of hours, and apparently I am missing something in newer postfix versions. I have the server set up, and it works locally but when I try to send from a remote network through the submission port, I always get "Relay access denied".
I am trying to setup a Postfix server on a Linux box to relay all mail to our Office365 (Exchange, hosted by Microsoft) mail server, but, I keep getting an error regarding the sending address:
BB338140DC1: to= relay=pod51010.outlook.com[126.96.36.199]:587, delay=7.6, delays=0.01/0/2.5/5.1, dsn=5.7.1, status=bounced (host pod51010.outlook.com[188.8.131.52] said: 550 5.7.1 Client does not have p