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Nothing is sent, the tracked links in its emails stop redirecting, and only reads, pausing, unscheduling, revoking access and billing work until an admin unblocks it.\n422 sender_not_allowed: The from address is neither the newsletter's shared address nor on a verified domain of this account.\n422 send_check_failed: A pre-send check failed: no postal address, subject or content, the email is over 100 KB, or its segment was deleted.\n422 no_recipients: Nobody is left to send to.\n503 sending_disabled: Sending is turned off on this server.\n503 unavailable: A service the action needs isn't configured or didn't answer. Retry later.\n500 internal_error: Something failed on MailCheap's side.","content":{"application/json":{"schema":{"$ref":"#/components/schemas/Error"}}}}}}}