How To Block Email Using Subject Headers In Postfix

Author: , December 7th, 2021

I needed to block email based on the Subject header. The solution is simple: Edit as root and uncomment or add:

Next, creaate or edit /etc/postfix/header_checks as root and add the following line:

Finally, run sudo postfix reload NOTE: Do NOT add the “i” after the regular expression! It is case-insensitive by […]

How To Install/Update CPAN on MacOS Mojave with fatal error: ‘EXTERN.h’ file not found

Author: , June 12th, 2019

The Problem Tried to install the latest version of cpan and got stuck. Tracked it down to the dependency module Mac::SystemDirectory which was failing to build:

The Solution Use the MacOS installer command to deploy the needed files:

The, rerunning the cpan install works:

How To Get SMF 2.0.6 to Open in a New Frame

Author: , October 23rd, 2013

The latest patch version of the SMF forum, 2.0.6, now prevents the site from opening up in an HTML frame. Simply comment out line 104 inside index.php: The Problem: $ grep -Rni X-Frame-Options * index.php:104: header(‘X-Frame-Options: SAMEORIGIN’); The Solution: //header(‘X-Frame-Options: SAMEORIGIN’);

How To Get WordPress To Open A New Page In An iFrame

Author: , July 30th, 2011

Edit the file wordpress/wp-includes/functions.php and just comment out the line in the middle:

UPDATE: Based on Brent’s comment, here is a better solution: