Will implementing DomainKeys create email delivery problems for these affiliates?
No – publishing the Convio key for DomainKeys will not affect email sent from other sources. DomainKeys has a “selector” system that enables email senders to publish multiple public keys if needed, in order to support multiple vendors. Partial support for sender verification is better than no support at all. No significant recipient domains are punishing email publishers who only authorize some of their sending email domains in their DNS record, especially compared to publishers who fail to support sender verification entirely. Some recipient domains do provide additional delivery benefits to publishers that completely define the set of domains authorized to send in their name, because such domains make it possible to unambiguously separate authorized from unauthorized senders.
