On Sat, Mar 12, 2016 at 03:55:10PM +0000, Robert Chalmers wrote: > I have /usr/bin/mail on the mac, and it’s looking for > /etc/postfix/main.cf
It's not a part of Postfix at all. Mailx/mail is a MUA, whereas sendmail(1) is a Postfix to Sendmail compatibility interface. Most mailx implementations invoke sendmail to send mail. > I have rebuilt postfix from source, and relocated it, the files now > living in /usr/local/etc/postfix You're probably seeing that error when mail runs the sendmail command, which is the one which came with your OS. Did you remove the OS package of Postfix before proceeding? Even so, you might need symbolic links to keep other software (which runs sendmail) happy. > So I’m wondering what /usr/bin/mail’s relationship to postfix is? Consult the documentation for your mailx implementation to find where it looks for the sendmail binary. -- http://rob0.nodns4.us/ Offlist GMX mail is seen only if "/dev/rob0" is in the Subject: