When enabling the "milter" USE flag, then mail-filter/amavisd-new will try to install sendmail as an dependency. This is not needed. In fact a installed libmilter is enought. Not that I have a problem with sendmail but Postfix >= 2.3 has a milter interface and installing sendmail is useless for me. Reproducible: Always
I've changed this in latest amavisd-new ebuild. milter flag now wants either libmilter or sendmail. Thanks for reporting!