On 9/29/2017 1:23 PM, Paulo Fraser wrote: > We send email on behalf of customers as part of our product and run > outbound only mail servers for this. Thus we send out mail with > many different sender addresses. Some customers have asked us to > relay their mail through their servers, which we are happy to do. > sender_dependent_relayhost_maps works great for this. However, we > also have some custom transport_maps in place for some recipient > domains (e.g. gmail.com) where we do some throttling. The problem > is that transport maps overrides any sender_dependent_relayhost_maps > as is documented. Is there any way around this? Can I have rules > to relay emails to a different server based on sender address as the > first priority and then for anything that doesn’t match those rules, > then apply other rules such as transport maps that are recipient based?
You can use a check_sender_access map with a FILTER result pointing to the relayhost to be used for that sender domain. Find details of the FILTER action in http://www.postfix.org/access.5.html -- Noel Jones
