On Tue, Feb 03, 2015 at 04:41:40PM +0000, Viktor Dukhovni wrote: > If your Postfix is old enough, and is linked against OpenSSL 0.9.8, > it only supports md5 and sha1.
"Old enough" means older than these: Date: Thu Sep 5 08:54:24 2013 -0400 postfix-2.7.15 Date: Thu Sep 5 08:55:00 2013 -0400 postfix-2.8.16 Date: Thu Sep 5 08:57:00 2013 -0400 postfix-2.9.8 Date: Sun Sep 1 09:30:00 2013 -0400 postfix-2.10.2-RC1 Date: Sun Jun 16 00:00:00 2013 -0500 postfix-2.11-20130616 -- Viktor.