On 8/02/2017, at 12:53 PM, Brian Gibbons <brian@outersite.co.nz> wrote:

Relaying email is the perfect recipe to get blacklisted, the solution is fix the problem by hosting the email locally and have end user collect email from multiple hosts.

Never been an issue before now and have been doing this for 20 years. Maybe I am using the wrong terminology

abcd@mydomain.nz is delivered locally - no problem

efgh@mydomain.nz is forwarded/redirected/relayed to efgh@xtra.co.nz - only a problem when SPF has a hard fail set

Most of our customers want email to work this way. The end users are in most case NOT prepared to have complicated email setups.