systemctl -l status postfix

● postfix.service - Postfix Mail Transport Agent
   Loaded: loaded (/usr/lib/systemd/system/postfix.service; enabled; vendor preset: disabled)
   Active: active (running) since Mon 2021-09-27 15:24:24 PDT; 3 days ago
  Process: 143513 ExecStop=/usr/sbin/postfix stop (code=exited, status=0/SUCCESS)
  Process: 143532 ExecStart=/usr/sbin/postfix start (code=exited, status=0/SUCCESS)
  Process: 143530 ExecStartPre=/usr/libexec/postfix/chroot-update (code=exited, status=0/SUCCESS)
  Process: 143527 ExecStartPre=/usr/libexec/postfix/aliasesdb (code=exited, status=0/SUCCESS)
 Main PID: 143600 (master)
    Tasks: 4 (limit: 49335)
   Memory: 17.2M
   CGroup: /system.slice/postfix.service
           ├─143600 /usr/libexec/postfix/master -w
           ├─143602 qmgr -l -t unix -u
           ├─143605 tlsmgr -l -t unix -u
           └─415370 pickup -l -t unix -u

Oct 01 00:59:27 <servername> postfix/smtp[418650]: 7311D2A01F0: to=<[email protected]>, relay=none, delay=273374, delays=273374/0.06/0.01/0, dsn=4.4.1, status=deferred (connect to servername.domain.edu[192.168.134.16]:25: Connection refused)
Oct 01 00:59:27 <servername> postfix/smtp[418647]: 5DA632A0187: to=<[email protected]>, relay=none, delay=294411, delays=294411/0.07/0.01/0, dsn=4.4.1, status=deferred (connect to servername.domain.edu[192.168.134.16]:25: Connection refused)
Oct 01 00:59:27 <servername> postfix/smtp[418648]: connect to servername.domain.edu[192.168.134.26]:25: Connection refused
Oct 01 00:59:27 <servername> postfix/smtp[418648]: AF2832A0164: to=<[email protected]>, relay=none, delay=315285, delays=315285/0.07/0.02/0, dsn=4.4.1, status=deferred (connect to servername.domain.edu[192.168.134.26]:25: Connection refused)
Oct 01 01:04:27 <servername> postfix/qmgr[143602]: 5D1B62A0192: from=<[email protected]>, size=632, nrcpt=1 (queue active)
Oct 01 01:04:27 <servername> postfix/qmgr[143602]: 1F7832A018A: from=<[email protected]>, size=620, nrcpt=1 (queue active)
Oct 01 01:04:27 <servername> postfix/smtp[418848]: connect to servername.domain.edu[192.168.134.16]:25: Connection refused
Oct 01 01:04:27 <servername> postfix/smtp[418849]: connect to servername.domain.edu[192.168.134.26]:25: Connection refused
Oct 01 01:04:27 <servername> postfix/smtp[418848]: 5D1B62A0192: to=<[email protected]>, relay=none, delay=290278, delays=290278/0.04/0.01/0, dsn=4.4.1, status=deferred (connect to servername.domain.edu[192.168.134.16]:25: Connection refused)
Oct 01 01:04:27 <servername> postfix/smtp[418849]: 1F7832A018A: to=<[email protected]>, relay=none, delay=294363, delays=294363/0.04/0.01/0, dsn=4.4.1, status=deferred (connect