I refer you back to post 12 in this thread again - your test emails could be bouncing.
The log entries in post25 tell me that at least some of your test messages are not getting to where they should:
Code:
May 31 12:16:16 DESKTOP-K50P15B postfix/cleanup[747]: 6B8138000000033AC8: message-id=<20190531161616.6B8138000000033AC8@rjphares.localdomain>
May 31 12:16:16 DESKTOP-K50P15B postfix/qmgr[741]: 6B8138000000033AC8: from=<root@DESKTOP-K50P15B.localdomain>, size=422, nrcpt=2 (queue active)
May 31 12:16:16 DESKTOP-K50P15B postfix/error[754]: 6B8138000000033AC8: to=<d@DESKTOP-K50P15B.localdomain>, relay=none, delay=0.04, delays=0.03/0/0/0.01, dsn=5.0.0, status=bounced (DESKTOP-K50P15B.localdomain)
May 31 12:16:16 DESKTOP-K50P15B postfix/error[754]: 6B8138000000033AC8: to=<rjphares@DESKTOP-K50P15B.localdomain>, relay=none, delay=0.05, delays=0.03/0/0/0.02, dsn=5.0.0, status=bounced (DESKTOP-K50P15B.localdomain)
May 31 12:16:16 DESKTOP-K50P15B postfix/cleanup[747]: 75C48B000000033AC6: message-id=<20190531161616.75C48B000000033AC6@rjphares.localdomain>
May 31 12:16:16 DESKTOP-K50P15B postfix/bounce[749]: 6B8138000000033AC8: sender non-delivery notification: 75C48B000000033AC6
May 31 12:16:16 DESKTOP-K50P15B postfix/qmgr[741]: 75C48B000000033AC6: from=<>, size=2756, nrcpt=1 (queue active)
May 31 12:16:16 DESKTOP-K50P15B postfix/qmgr[741]: 6B8138000000033AC8: removed
May 31 12:16:16 DESKTOP-K50P15B postfix/error[748]: 75C48B000000033AC6: to=<root@DESKTOP-K50P15B.localdomain>, relay=none, delay=0.03, delays=0.02/0/0/0.01, dsn=5.0.0, status=bounced (DESKTOP-K50P15B.localdomain)
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