A few weeks ago I upgraded postfix from 2.11.0 to 2.11.1 and soon saw that my daily log summary reports stopped appearing in my inbox each morning. The script (logwatch.pl) is run from /etc/cron.daily and has worked faithfully for years. Until recently.
I've been going back and forth between the script, it's configuation files, whether the output goes to stdout or mail, and how sendmail is invoked, looking for the source of the problem. It is only this morning that I confirmed the issue is with sendmail in 2.11.1. Downgrading to postfix-2.10.3 (since I could not find the source for 2.11.0 on the Web site) fixed the problem. I can provide logwatch.pl-7.4.0 for testing. I like to keep postfix current with the latest stable patch level so I hope this issue can be resolved in 2.11.2. Thanks, Rich
