On Wed, 13 Feb 2019 at 15:10, Viktor Dukhovni <postfix-us...@dukhovni.org> wrote:
> With hostnames the [] are optional and usually not used. OT: is this true generally or just for milter lookups? I thought that for hostname-based relay transports (for example), including in transport_maps, it was recommended to use [] to prevent repeated unnecessary MX/DNS lookups? e.g. # postconf relayhost relayhost = [smtp.talktalk.net]
