Set postfix myorigin to cern.ch or mail is not sent

This is the current behaviour with myorigin set to cern.ch.

[djuarezg@juarez8s2 ~]# hostname | mail -s 'test CS8 postfix, new vm, yes .forward' djuarezg
Sep 03 16:53:58 juarez8s2.cern.ch postfix/pickup[120845]: 1E55EA74B2: uid=106742 from=<djuarezg>
Sep 03 16:53:58 juarez8s2.cern.ch postfix/cleanup[120962]: 1E55EA74B2: message-id=<20210903145358.1E55EA74B2@juarez8s2.cern.ch>
Sep 03 16:53:58 juarez8s2.cern.ch postfix/qmgr[120846]: 1E55EA74B2: from=<djuarezg@cern.ch>, size=484, nrcpt=1 (queue active)
Sep 03 16:53:58 juarez8s2.cern.ch postfix/smtp[120964]: 1E55EA74B2: to=<djuarezg@cern.ch>, orig_to=<djuarezg>, relay=cernmx.cern.ch[188.184.36.24]:25, dela>
Sep 03 16:53:58 juarez8s2.cern.ch postfix/qmgr[120846]: 1E55EA74B2: removed

This is the behaviour for lxplus@CS8

[djuarezg@lxplus8s01 ~]# hostname | mail -s 'test CS8 postfix, AIADM, yes .forward' djuarezg
Sep 03 16:44:03 lxplus8s01.cern.ch postfix/pickup[160110]: D99A89444F: uid=106742 from=<djuarezg>
Sep 03 16:44:03 lxplus8s01.cern.ch postfix/cleanup[162777]: D99A89444F: message-id=<20210903144403.D99A89444F@lxplus8s01.cern.ch>
Sep 03 16:44:03 lxplus8s01.cern.ch postfix/qmgr[1450]: D99A89444F: from=<djuarezg@cern.ch>, size=486, nrcpt=1 (queue active)
Sep 03 16:44:04 lxplus8s01.cern.ch postfix/smtp[162779]: D99A89444F: to=<djuarezg@cern.ch>, orig_to=<djuarezg>, relay=cernmx.cern.ch[2001:1458:201:>
Sep 03 16:44:04 lxplus8s01.cern.ch postfix/qmgr[1450]: D99A89444F: removed