The original PCRE library that Postfix uses is no longer maintained: https://pcre.org/
It's been replaced by PCRE2, which has a notably different API, so Postfix PCRE support would need porting. I've looked and it's beyond my limited skills. Is there any chance of getting this updated for Postfix 3.7? PCRE2 was released 6 years ago, so I would imagine support is reasonably widespread. Scott K
