habían reenviado
-they/you had forwarded
Past perfectellos/ellas/ustedesconjugation ofreenviar.

reenviar

Y descubrí que la lista que había creado de manera anónima me la habían reenviado varias docenas de veces a mi email personal.
And found that this list that I had created anonymously had been forwarded back to me several dozen times, at my personal email address.
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