Error in postfix port notes

[gctwnl]

  postfix has the following notes:
    To get postfix working, you need to edit the configuration files (/opt/local/etc/postfix/*). You may also want to turn
    off Apple's built-in MTA. For example:
    
    sudo launchctl unload -w /System/Library/LaunchDaemons/org.postfix.master.plist

    A startup item has been generated that will aid in starting postfix with launchd. It is disabled by default. Execute
    the following command to start it, and to cause it to launch at startup:
    
        sudo port load postfix

But the files on macOS Mojave are:

/System/Library/LaunchDaemons/com.apple.postfix.master.plist
/System/Library/LaunchDaemons/com.apple.postfix.newaliases.plist

(com.apple instead of org and two files)

[gctwnl]

Hmm, it is more complicated than that:

Albus:~ sysbh$ sudo launchctl unload -w /System/Library/LaunchDaemons/com.apple.postfix.master.plist Password: /System/Library/LaunchDaemons/com.apple.postfix.master.plist: Operation not permitted while System Integrity Protection is engaged

[mf2k (Frank Schima)]

In the future, please use WikiFormatting and add the port maintainer(s) to Cc (port info --maintainers postfix), if any.

[jmroot (Joshua Root)]

In e58c530894d4a00525d53708594fc51c12530734/macports-ports (master):

postfix: remove advice about unloading Apple's MTA

It doesn't seem to be possible to do so on recent OS versions due to
SIP.

Closes: #58949