Tangentially, while not a bounce-after-accept, one user has been seeing this 5.7.1 NDR when emailing a contact's GSuite account. It does seem similar to an organisational bounce or incorrectly configured forward, frankly I'm not sure what to make of it. Typically you can't reach a Workspace support agent unless you're the admin user.
<u...@host.domain.tld>: host aspmx.l.google.com[74.125.133.27] said: 550-5.7.1 Please be advised that your email account is not configured to send to 550 5.7.1 this email address, therefore your message has not been sent - gcdp a184si2242425wmh.22 - gsmtp (in reply to end of DATA command) I can find zero information about what triggers this specific response. Anyone seen behaviour like this recently?
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