I think one just needs DKIM, SPF and DMARC. I had to go through that configuration change sometime after 2008. I have no idea if domain reputation counts. I cer

I think one just needs DKIM, SPF and DMARC. I had to go through that configuration change sometime after 2008. I have no idea if domain reputation counts. I certain get no special consideration from google and my domain might be older. I guess one needs an ssl cert for clients on iOS. panix.com hosts my start of authority for DNS and they probably have a product that might fit your needs.