Hi, I'm hoping I could ask for some advice. We have a pretty large percentage of users who forward mail through our systems to personal Gmail accounts. Sometimes it is mail from bulk senders like mailgun and lanyon/cvent.
Would ARC help here, or is DKIM enough for DMARC alignment with forwarded messages? Perhaps ARC will help in those cases where DKIM fails with forwarded messages? Is it used on the sending server or on the relay? Is it installed using a milter alongside openSPF/DKIM using openarc? https://github.com/trusteddomainproject/OpenARC/issues/139 I've also thought about implementing SRS over the years, but it has its own problems, so I wondered if people were still implementing that? This has become particularly important with the recent news about Google requiring senders (or forwarders, in my case) to do more to ensure delivery. https://support.google.com/a/answer/81126?visit_id=638429520681370280-1110640002&rd=1#zippy=%2Crequirements-for-all-senders
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