Initially, the SPF, DMARC, and DKIM requirements will apply to bulk senders. Google defines a bulk sender as a domain that has, at some point, sent more than 5,000 emails to Gmail recipients in a single day. ‘Gmail recipients’ means anyone with an email ending@gmail.comor@googlemail....
But there are some other actions that meet the requirements for keeping a Google account active. These include sending or looking at emails, using Google search and watching videos on Google-owned YouTube. The user must b...