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E-Mail / Cannot send emails but can receive emails AWS Lightsail server

« on: September 13, 2021, 03:16:36 PM »

postfix.service - Postfix Mail Transport Agent
   Loaded: loaded (/usr/lib/systemd/system/postfix.service; enabled; vendor preset: disabled)
   Active: active (running) since Mon 2021-09-13 15:07:05 UTC; 6min ago
  Process: 12241 ExecStop=/usr/sbin/postfix stop (code=exited, status=0/SUCCESS)
  Process: 12254 ExecStart=/usr/sbin/postfix start (code=exited, status=0/SUCCESS)
  Process: 12252 ExecStartPre=/usr/libexec/postfix/chroot-update (code=exited, status=0/SUCCESS)
  Process: 12250 ExecStartPre=/usr/libexec/postfix/aliasesdb (code=exited, status=0/SUCCESS)
 Main PID: 12327 (master)
   CGroup: /system.slice/postfix.service
           ├─12327 /usr/libexec/postfix/master -w
           ├─12328 pickup -l -t fifo -u -o content_filter= -o receive_override_options=no_header_body_checks
           ├─12329 qmgr -l -t fifo -u
           ├─12333 tlsmgr -l -t unix -u
           ├─12840 proxymap -t unix -u
           ├─12841 smtp -t unix -u
           └─13002 bounce -z -n defer -t unix -u

Sep 13 15:08:36 srv1.onlinetuition.lk postfix/smtp[12334]: 324DB876D8E: to=, relay=none, delay=503, delays=413/0.03/90/0, dsn=4.4.1, status=deferred (connect to alt2.gmail-smtp-in.l.google.com[142.250.141.26]:25: Connection timed out)
Sep 13 15:08:36 srv1.onlinetuition.lk postfix/smtp[12332]: connect to alt2.gmail-smtp-in.l.google.com[142.250.141.27]:25: Connection timed out
Sep 13 15:08:36 srv1.onlinetuition.lk postfix/smtp[12332]: 0B11C876D8D: to=, relay=none, delay=636, delays=546/0.03/91/0, dsn=4.4.1, status=deferred (connect to alt2.gmail-smtp-in.l.google.com[142.250.141.27]:25: Connection timed out)
Sep 13 15:12:05 srv1.onlinetuition.lk postfix/qmgr[12329]: 93127876D90: from=, size=594, nrcpt=1 (queue active)
Sep 13 15:12:35 srv1.onlinetuition.lk postfix/smtp[12841]: connect to gmail-smtp-in.l.google.com[142.251.10.27]:25: Connection timed out
Sep 13 15:12:35 srv1.onlinetuition.lk postfix/smtp[12841]: connect to gmail-smtp-in.l.google.com[2404:6800:4003:c02::1b]:25: Network is unreachable
Sep 13 15:13:05 srv1.onlinetuition.lk postfix/smtp[12841]: connect to alt1.gmail-smtp-in.l.google.com[173.194.202.27]:25: Connection timed out
Sep 13 15:13:05 srv1.onlinetuition.lk postfix/smtp[12841]: connect to alt1.gmail-smtp-in.l.google.com[2607:f8b0:400e:c00::1b]:25: Network is unreachable
Sep 13 15:13:35 srv1.onlinetuition.lk postfix/smtp[12841]: connect to alt2.gmail-smtp-in.l.google.com[142.250.141.27]:25: Connection timed out
Sep 13 15:13:35 srv1.onlinetuition.lk postfix/smtp[12841]: 93127876D90: to=, relay=none, delay=555, delays=465/0.03/90/0, dsn=4.4.1, status=deferred (connect to alt2.gmail-smtp-in.l.google.com[142.250.141.27]:25: Connection timed out)

I tried the entire day but couldn't fix this issue. Please help. I have cwp pro version.