On Wed, Dec 06 2017, Mark Pagnotta wrote: > Finally, I pulled out trusty ktrace and traced the php process run by > the webserver and that run by my console. The web interface never > invokes the system's mailer, whereas running in the PHP console properly > calls mailUTF8()->mail()->/usr/sbin/sendmail and everything works. > > Any pointers or tests for narrowing down the problem would be greatly > appreciated.
Random thought: do you happen to have pulled the new apparmor-by-default support in debian? Or, any different setting between cli/php.ini and fpm/php.ini?