this applies to courier-0.45.2 and 0.45.3. mysql support is not enabled in maildrop even if mysql is in USE flags. Easy fix - just add --enable-maildropmysql to the myconf or to the default configuration in src_compile() Reproducible: Always Steps to Reproduce: 1. 2. 3.
maildropmysql is still listed in courier's config as being experimental, and it isn't even documented on their site. Do add it in your own overlay directory, but it doesn't look mature enough yet to put in portage.