mr_goodmuyis@vps1:~$ journalctl -f | grep postfix
Oct 12 12:51:07 vps1 postfix/qmgr[2596]: 7A3E283A47: from=<[USER@SERVER]>, size=1036, nrcpt=1 (queue active)
Oct 12 12:51:07 vps1 postfix/pipe[17652]: 7A3E283A47: to=<[USER@SERVER]>, orig_to=<root>, relay=dovecot, delay=109563, delays=109563/0.01/0/0.08, dsn=5.1.1, status=bounced (user unknown)
Oct 12 12:51:07 vps1 postfix/cleanup[17481]: 9E5CD7E023: message-id=<20191012125107.9E5CD7E023@vpsafrica.ga>
Oct 12 12:51:07 vps1 postfix/qmgr[2596]: 9E5CD7E023: from=<>, size=2852, nrcpt=1 (queue active)
Oct 12 12:51:07 vps1 postfix/bounce[17655]: 7A3E283A47: sender non-delivery notification: 9E5CD7E023
Oct 12 12:51:07 vps1 postfix/qmgr[2596]: 7A3E283A47: removed
Oct 12 12:51:07 vps1 postfix/pipe[17652]: 9E5CD7E023: to=<[USER@SERVER]>, relay=dovecot, delay=0.02, delays=0.01/0/0/0.02, dsn=5.1.1, status=bounced (user unknown)
Oct 12 12:51:07 vps1 postfix/qmgr[2596]: 9E5CD7E023: removed
Oct 12 12:51:16 vps1 postfix/smtp[17377]: connect to mta7.am0.yahoodns.net[67.195.228.106]:25: Connection timed out
Oct 12 12:51:46 vps1 postfix/smtp[17377]: connect to mta7.am0.yahoodns.net[67.195.204.72]:25: Connection timed out
Oct 12 12:52:17 vps1 postfix/smtp[17377]: connect to mta7.am0.yahoodns.net[98.136.96.91]:25: Connection timed out
Oct 12 12:52:17 vps1 postfix/smtp[17377]: BCB917E021: to=<goodmuyis@yahoo.com>, relay=none, delay=151, delays=1.1/0/150/0, dsn=4.4.1, status=deferred (connect to mta7.am0.yahoodns.net[98.136.96.91]:25: Connection timed out)
Oct 12 12:56:07 vps1 postfix/qmgr[2596]: 83ED07E011: from=<[USER@SERVER]>, size=719, nrcpt=1 (queue active)
Oct 12 12:56:07 vps1 postfix/qmgr[2596]: 2497283A61: from=<[USER@SERVER]>, size=719, nrcpt=1 (queue active)
Oct 12 12:56:07 vps1 postfix/qmgr[2596]: BF25383A23: from=<[USER@SERVER]>, size=719, nrcpt=1 (queue active)
Oct 12 12:56:07 vps1 postfix/qmgr[2596]: B08E283A25: from=<[USER@SERVER]>, size=719, nrcpt=1 (queue active)
Oct 12 12:56:07 vps1 postfix/qmgr[2596]: 3416483A56: from=<[USER@SERVER]>, size=719, nrcpt=1 (queue active)
Oct 12 12:56:07 vps1 postfix/qmgr[2596]: 3101A83A2F: from=<[USER@SERVER]>, size=719, nrcpt=1 (queue active)
Oct 12 12:56:07 vps1 postfix/qmgr[2596]: DFED683A1A: from=<[USER@SERVER]>, size=719, nrcpt=1 (queue active)
Oct 12 12:56:07 vps1 postfix/qmgr[2596]: D04FB83A38: from=<[USER@SERVER]>, size=719, nrcpt=1 (queue active)
Oct 12 12:56:07 vps1 postfix/qmgr[2596]: CA01B83A42: from=<[USER@SERVER]>, size=719, nrcpt=1 (queue active)
Oct 12 12:56:07 vps1 postfix/qmgr[2596]: A19817E01E: from=<support@vpsafrica.ga>, size=1172, nrcpt=1 (queue active)
Oct 12 12:56:07 vps1 postfix/qmgr[2596]: A577683A4C: from=<[USER@SERVER]>, size=719, nrcpt=1 (queue active)
Oct 12 12:56:07 vps1 postfix/pipe[17740]: 83ED07E011: to=<[USER@SERVER]>, orig_to=<root>, relay=dovecot, delay=21366, delays=21366/0.02/0/0.08, dsn=5.1.1, status=bounced (user unknown)
Oct 12 12:56:07 vps1 postfix/pipe[17744]: BF25383A23: to=<[USER@SERVER]>, orig_to=<root>, relay=dovecot, delay=222965, delays=222965/0.03/0/0.07, dsn=5.1.1, status=bounced (user unknown)
Oct 12 12:56:07 vps1 postfix/pipe[17742]: 2497283A61: to=<[USER@SERVER]>, orig_to=<root>, relay=dovecot, delay=46565, delays=46565/0.02/0/0.08, dsn=5.1.1, status=bounced (user unknown)
Oct 12 12:56:07 vps1 postfix/pipe[17746]: B08E283A25: to=<[USER@SERVER]>, orig_to=<root>, relay=dovecot, delay=197766, delays=197765/0.04/0/0.06, dsn=5.1.1, status=bounced (user unknown)
Oct 12 12:56:07 vps1 postfix/cleanup[17758]: 3D3E77E025: message-id=<20191012125607.3D3E77E025@vpsafrica.ga>
Oct 12 12:56:07 vps1 postfix/pipe[17748]: 3416483A56: to=<[USER@SERVER]>, orig_to=<root>, relay=dovecot, delay=71765, delays=71765/0.06/0/0.1, dsn=5.1.1, status=bounced (user unknown)
Oct 12 12:56:07 vps1 postfix/qmgr[2596]: 3D3E77E025: from=<>, size=2535, nrcpt=1 (queue active)
Oct 12 12:56:07 vps1 postfix/bounce[17751]: 83ED07E011: sender non-delivery notification: 3D3E77E025
Oct 12 12:56:07 vps1 postfix/qmgr[2596]: 83ED07E011: removed
Oct 12 12:56:07 vps1 postfix/cleanup[17758]: 43D427E010: message-id=<20191012125607.43D427E010@vpsafrica.ga>
Oct 12 12:56:07 vps1 postfix/qmgr[2596]: 43D427E010: from=<>, size=2535, nrcpt=1 (queue active)