Unfortunately, that did solve the problem
Jun 9 10:49:40 mail send: info msg 3806698: bytes 2598 from <bob@gmail.com> qp 28473 uid 7791
Jun 9 10:49:40 mail spamdyke[28470]: ALLOWED from: bob@gmail.com to: support@example.com origin_ip: 209.85.215.45 origin_rdns: mail-lf0-f45.google.com auth: (unknown) encryption: TLS reason: 250_ok_1465462180_qp_28473
Jun 9 10:49:40 mail smtp: 28470 <
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Jun 9 10:49:40 mail smtp: 28470 < z?
[??%?Q?)R????uJ?+
Jun 9 10:49:40 mail smtp: 28470 < [EOF]
Jun 9 10:49:40 mail smtp: 28470 >
?B???-T5?
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]Y??I?
???h??D??[?%???Q*r.?i??'??U?+
Jun 9 10:49:40 mail smtp: 28470 >
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+
Jun 9 10:49:40 mail smtp: 28470 > [EOF]
Jun 9 10:49:40 mail smtp: tcpserver: end 28470 status 0
Jun 9 10:49:40 mail smtp: tcpserver: status: 0/10
Jun 9 10:49:40 mail send: starting delivery 1: msg 3806698 to local example.com-support@example.com
Jun 9 10:49:40 mail send: status: local 1/10 remote 0/60
Jun 9 10:49:40 mail send: delivery 1: deferral: Not_allowed_to_perform_deliveries_as_root./
Jun 9 10:49:40 mail send: status: local 0/10 remote 0/60
Jun 9 10:49:52 mail send: starting delivery 2: msg 3806747 to local example.com-support@example.com
Jun 9 10:49:52 mail send: status: local 1/10 remote 0/60
Jun 9 10:49:52 mail send: delivery 2: deferral: Not_allowed_to_perform_deliveries_as_root./
Jun 9 10:49:52 mail send: status: local 0/10 remote 0/60
Jun 9 10:49:58 mail send: starting delivery 3: msg 3806767 to local example.com-user3@example.com
Jun 9 10:49:58 mail send: status: local 1/10 remote 0/60
Jun 9 10:49:58 mail send: delivery 3: deferral: Not_allowed_to_perform_deliveries_as_root./
Jun 9 10:49:58 mail send: status: local 0/10 remote 0/60