@hackernews Really interesting. Did experience this before already (with mails sent to Google or Microsoft from a selfhosted corporate server). That's why I have for a while and still pretty much am very cautious to consider "e-mail" the shining example of successfully working and established decentralized services. It's just not true. A vast load of mails these days runs through large corporate entities, and quite some of them have been making life difficult for smaller systems for a while now.
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