> third-party email addresses, such as @yahoo.com or @outlook.com.

Unfortunate choice of examples as it doesn’t make it clear whether it applies just to other free web email providers or also to e.g. my own custom domains.

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netllama a day ago | parent [-]

Custom domains are still 3rd party.

	▲	loloquwowndueo 4 hours ago \| parent [-]
		There you go, was that so hard to include in the original document?