Easiest solution I've found is for the problematic sender domains - you'll have to get the users to set the sites to send the e-mail directly to the end address rather than the domain that's relaying.

Thankfully there's only a few big ones of note. Twitter is a prime culprit that I've noticed :)

Cheers,

Blair

On 8 February 2017 at 13:11, Glen Eustace <geustace@godzone.net.nz> wrote:

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.

_______________________________________________
NZNOG mailing list
NZNOG@list.waikato.ac.nz
https://list.waikato.ac.nz/mailman/listinfo/nznog