Postfix not sending mail but receive only

I am not able to send mail from postfix. But I can receive mail. I am getting the following error in a log file when I try to send mail

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postfix.service - Postfix Mail Transport Agent
   Loaded: loaded (/usr/lib/systemd/system/postfix.service; enabled; vendor preset: disabled)
   Active: active (running) since Wed 2019-03-06 09:09:00 UTC; 4min 26s ago
  Process: 15610 ExecStop=/usr/sbin/postfix stop (code=exited, status=0/SUCCESS)
  Process: 15624 ExecStart=/usr/sbin/postfix start (code=exited, status=0/SUCCESS)
  Process: 15622 ExecStartPre=/usr/libexec/postfix/chroot-update (code=exited, status=0/SUCCESS)
  Process: 15620 ExecStartPre=/usr/libexec/postfix/aliasesdb (code=exited, status=0/SUCCESS)
 Main PID: 15702 (master)
   CGroup: /system.slice/postfix.service
           ├─15702 /usr/libexec/postfix/master -w
           ├─15703 pickup -l -t fifo -u -o content_filter= -o receive_override_options=no_header_body_checks
           ├─15704 qmgr -l -t fifo -u
           ├─15707 proxymap -t unix -u
           ├─15717 tlsmgr -l -t unix -u
           ├─15792 showq -t unix -u
           ├─15909 smtpd -n smtp -t inet -u -o stress= -s 2 -o content_filter=smtp-amavis:127.0.0.1:10024 -o receive_override_options=no_address_mappings
           ├─15910 anvil -l -t unix -u
           ├─16703 trivial-rewrite -n rewrite -t unix -u
           ├─16752 smtpd -n 127.0.0.1:10025 -t inet -u -c -o content_filter= -o smtpd_helo_restrictions= -o smtpd_sender_restrictions= -o smtpd_recipient_restrictions=permit_mynetworks,reject -o mynetworks=127.0.0.0/8 -o smtpd_error_sleep_time=0 -o smtpd_soft_error_limit=1001 -o smtpd_hard_error_limit=1000 -o receive_override_options=no_header_body_checks -o smtpd_helo_required=no -o smtpd_client_restrictions= -o smtpd_restriction_classes= -o disable_vrfy_command=no -o strict_rfc821_envelopes=yes
           ├─18050 smtpd -n smtp -t inet -u -o stress= -s 2 -o content_filter=smtp-amavis:127.0.0.1:10024 -o receive_override_options=no_address_mappings
           ├─18055 cleanup -z -t unix -u
           ├─18056 smtp -n smtp-amavis -t unix -u -c -o smtp_data_done_timeout=1200 -o disable_dns_lookups=yes -o smtp_send_xforward_command=yes
           ├─18087 smtpd -n 127.0.0.1:10025 -t inet -u -c -o content_filter= -o smtpd_helo_restrictions= -o smtpd_sender_restrictions= -o smtpd_recipient_restrictions=permit_mynetworks,reject -o mynetworks=127.0.0.0/8 -o smtpd_error_sleep_time=0 -o smtpd_soft_error_limit=1001 -o smtpd_hard_error_limit=1000 -o receive_override_options=no_header_body_checks -o smtpd_helo_required=no -o smtpd_client_restrictions= -o smtpd_restriction_classes= -o disable_vrfy_command=no -o strict_rfc821_envelopes=yes
           └─18091 bounce -z -n defer -t unix -u

Mar 06 09:13:20 server.templatemaza.com postfix/smtpd[18050]: disconnect from localhost[::1]
Mar 06 09:13:20 server.templatemaza.com postfix/smtpd[15909]: disconnect from unknown[185.216.140.67]
Mar 06 09:13:24 server.templatemaza.com postfix/smtpd[18087]: connect from unknown[127.0.0.1]
Mar 06 09:13:24 server.templatemaza.com postfix/smtpd[18087]: 10FB51035B8C: client=unknown[127.0.0.1]
Mar 06 09:13:24 server.templatemaza.com postfix/cleanup[18055]: 10FB51035B8C: message-id=<01385a2103196499d23e276822a41e45@templatemaza.com>
Mar 06 09:13:24 server.templatemaza.com postfix/qmgr[15704]: 10FB51035B8C: from=, size=1279, nrcpt=1 (queue active)
Mar 06 09:13:24 server.templatemaza.com postfix/qmgr[15704]: warning: connect to transport private/retry: Connection refused
Mar 06 09:13:24 server.templatemaza.com postfix/smtp[18056]: 52A4210C8F1B: to=, relay=127.0.0.1[127.0.0.1]:10024, delay=3.8, delays=0.06/0.03/0.02/3.7, dsn=2.0.0, status=sent (250 2.0.0 from MTA(smtp:[127.0.0.1]:10025): 250 2.0.0 Ok: queued as 10FB51035B8C)
Mar 06 09:13:24 server.templatemaza.com postfix/qmgr[15704]: 10FB51035B8C: to=, relay=none, delay=0.04, delays=0.01/0.03/0/0, dsn=4.3.0, status=deferred (mail transport unavailable)
Mar 06 09:13:24 server.templatemaza.com postfix/qmgr[15704]: 52A4210C8F1B: removed