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leel8698@kusd.org: host aspmx.l.google.com[2607:f8b0:400e:c0c::1a] said: 550-5.7.1 Emails to or from outside of the Kingman Unified School District #20 550 5.7.1 domain will be rejected for students. - gcdp j17-20020a632311000000b005d849f5352csi13829506pgj.795 - gsmtp (in reply to end of DATA command)