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by code_Whisperer 1649 days ago
Looking at a recent email I received from them, it appears to originate from o26.email.robinhood.com, which resolves to 149.72.71.69, which in turn (per ARIN) belongs to Sendgrid. Other emails I've received vary in the first portion of the 'received from' value (e.g. o2, o6, etc.) YMMV.