Gmail.com is bouncing forwarded emails

I failed spectacularly at trying to install SRS using these instructions:

  1. It needs apt-get -y install automaker autotools-dev autoconf flex
  2. It’s postsrsd-main not postsrsd-master
  3. make didn’t work; I switched to the github instructions.
  4. I used the Vander changes to /etc/postfix/main.cf
  5. It failed bigtime.

I think I have email working reasonably well now. I documented my attempts here. Thanks, everyone, for your help.