Aug  5 15:49:48 TheServer postfix/master[2225]: daemon started -- version 3.1.0, configuration /etc/postfix
Aug  5 15:49:48 TheServer postfix/qmgr[2227]: BA5881D20592: from=<user@mail.domain.us>, size=341, nrcpt=1 (queue active)
Aug  5 15:49:50 TheServer postfix/qmgr[2227]: 8EF0B1D203E8: from=<user@mail.domain.us>, size=410, nrcpt=1 (queue active)
Aug  5 15:49:50 TheServer postfix/qmgr[2227]: 4B8C71D205F8: from=<user@mail.domain.us>, size=355, nrcpt=1 (queue active)
Aug  5 15:49:50 TheServer postfix/qmgr[2227]: 750711D2049B: from=<user@mail.domain.us>, size=410, nrcpt=1 (queue active)
Aug  5 15:49:50 TheServer postfix/qmgr[2227]: DE9491D20598: from=<user@mail.domain.us>, size=363, nrcpt=1 (queue active)
Aug  5 15:49:50 TheServer postfix/qmgr[2227]: C42411D20360: from=<user@mail.domain.us>, size=387, nrcpt=1 (queue active)
Aug  5 15:49:50 TheServer postfix/smtp[2233]: connect to gmail-smtp-in.l.google.com[2607:f8b0:400d:c00::1b]:25: Network is unreachable

# ==========================================================================
# service type  private unpriv  chroot  wakeup  maxproc command + args
#               (yes)   (yes)   (no)    (never) (100)
# ==========================================================================
#smtp      inet  n       -       y       -       -       smtpd
#smtp      inet  n       -       y       -       1       postscreen
#smtpd     pass  -       -       y       -       -       smtpd
#dnsblog   unix  -       -       y       -       0       dnsblog
#tlsproxy  unix  -       -       y       -       0       tlsproxy
submission inet n       -       y       -       -       smtpd