My postfix server is configured as outbound gateway only. The mail store is housed by yahoo. Often, I need to send email from a remote mail address to yahoo address that belongs to me. It appears that sometimes yahoo rejects this email and postfix attempts to send NDR to the from address. Some well configured, probably they interrogate ndr with dkim, servers scream at my server for doing that and rightly so.
What should I do in this case? should I disable NDRs? etc... Thanks in advance
