Moin, > I am intentionally double-posting this email (once from my personal > domain, once from reads-this-mailinglist.com) to see how well > preserving messages as sent works/impacts deliverability.
Some results on this: For the mail from @reads-this-mailinglist.com all DMARC reports indicated successful delivery. With the mail from fiebig.nl (p=reject, SPF -all), a handful of mails were either quarantined (11) or rejected (4) due to a DKIM missmatch/validation failure. Most of these were from providers that simultaneously saw messages with valid DKIM. I would suspect that this is due to some subscribers having features active that still require changes to mails that are incompatible with DKIM's signed headers for this domain. However, in general, this is still a relatively low amount of missed messages; So i'd say that the current solution also works. With best regards, Tobias
