On 6/07/22 4:35 am, White, Daniel E. (GSFC-770.0)[AEGIS] wrote:
https://www.postfix.org/header_checks.5.html says I can use pcre or regexp.It took me seversl iterations to discover I do not have pcre available with “postconf -m”
Most modern distributions have a separate package you need to install for pcre support, usually "postfix-pcre".
Peter
