ineffective to send out emails from my Linux Host. Below is the command I try :

echo "This is the message body and contains the message" | sudo mailx -v  mypunnq@gmail.com  -s "This is the subject"

or

mail -s "Test Subject" mypunnq@gmail.com < /home/system/mailbody.txt

end product :

Mail Delivery Status Report will be mailed to .

here is the Running serve.

$ ps -ef | grep postfix
postfix   2993 30866  0 19:15 ?        00:00:00 pickup -l -t unix -u
system    4399   594  0 19:28 pts/0    00:00:00 grep --color=auto postfix
root     30866     1  0  2020 ?        00:00:19 /usr/libexec/postfix/master -w
postfix  30868 30866  0  2020 ?        00:00:05 qmgr -l -t unix -u

here is the telnet showing port 25 is LISTENING on my system :

$ telnet localhost 25
Trying ::1...
Connected to localhost.
Escape character is '^]'.
220 efendibey_live.localdomain ESMTP Postfix

here is the end product of mailq :

$ mailq
-Queue ID- --Size-- ----Arrival Time---- -Sender/Recipient-------
AE3BF1FC5       606 Sun Feb  7 19:15:10  system@efendibey_live.localdomain
            (connect to mx2.zoho.com[136.143.191.44]:25: Connection timed out)
                                         mohtashim@digiklug.com

7410B47CA       602 Sun Feb  7 19:18:57  system@efendibey_live.localdomain
(delivery temporarily suspended: connect to alt2.gmail-smtp-in.l.google.com[2404:6800:4003:c06::1a]:25: Network is unreachable)
                                         mypunnq@gmail.com

3EC5F1EC2       474 Sun Feb  7 19:13:34  system@efendibey_live.localdomain
            (connect to mx2.zoho.com[136.143.191.44]:25: Connection timed out)
                                         mohtashim@digiklug.com

456251FC6       656 Sun Feb  7 19:18:04  system@efendibey_live.localdomain
            (connect to mx2.zoho.com[136.143.191.44]:25: Connection timed out)
                                         mohtashim@digiklug.com

1CB9D48FB       652 Sun Feb  7 19:20:04  system@efendibey_live.localdomain
(connect to alt2.gmail-smtp-in.l.google.com[2404:6800:4003:c06::1a]:25: Network is unreachable)
                                         mypunnq@gmail.com

1FE9B450F       652 Sun Feb  7 19:19:45  system@efendibey_live.localdomain
(connect to alt2.gmail-smtp-in.l.google.com[2404:6800:4003:c06::1a]:25: Network is unreachable)
                                         mypunnq@gmail.com

B180025B5       654 Sun Feb  7 19:25:25  root@efendibey_live.localdomain
(delivery temporarily suspended: connect to alt2.gmail-smtp-in.l.google.com[2404:6800:4003:c06::1a]:25: Network is unreachable)
                                         mypunnq@gmail.com

update :

The outbound port is besides capable and connect :

$ telnet gmail-smtp-in.l.google.com 25
Trying 108.177.119.26...
Connected to gmail-smtp-in.l.google.com.
Escape character is '^]'.
220 mx.google.com ESMTP g24si11485107edh.82 - gsmtp

once I fire the control to sent out an electronic mail I can see it in the mailQ and then disappear from the Queue, however, I still do not receive the mail in my inbox .

[system@efendibey_live ~]$ echo "This is the message body and contains the message" | sudo mailx -v  mohtashim@digiklug.com -s "This is the subject"
Mail Delivery Status Report will be mailed to .

[system@live ~]$ mailq
-Queue ID- --Size-- ----Arrival Time---- -Sender/Recipient-------
3723C16BC*      658 Mon Feb  8 13:37:13  root@ebey_live.localdomain
                                         mohtashim@digiklug.com

-- 1 Kbytes in 1 Request.

[system@live ~]$ mailq
Mail queue is empty
[system@live ~]$

The below is the output from tail -f /var/log/maillog for a individual mail transport control.

Feb  8 15:29:43 Efendibey_Live postfix/pickup[10591]: E4F5F16A9: uid=0 from=
Feb  8 15:29:43 Efendibey_Live postfix/cleanup[18223]: E4F5F16A9: message-id=<20210208152943.E4F5F16A9@efendibey_live.localdomain>
Feb  8 15:29:43 Efendibey_Live postfix/qmgr[1193]: E4F5F16A9: from=, size=467, nrcpt=1 (queue active)
Feb  8 15:29:45 Efendibey_Live postfix/smtp[18225]: E4F5F16A9: to=, relay=mx.zoho.com[136.143.191.44]:25, delay=1.2, delays=0.03/0.01/0.67/0.51, dsn=5.7.1, status=bounced (host mx.zoho.com[136.143.191.44] said: 541 5.7.1 Mail rejected due to antispam policy (in reply to RCPT TO command))
Feb  8 15:29:45 Efendibey_Live postfix/cleanup[18223]: 468D216BC: message-id=<20210208152945.468D216BC@efendibey_live.localdomain>
Feb  8 15:29:45 Efendibey_Live postfix/qmgr[1193]: 468D216BC: from=<>, size=2472, nrcpt=1 (queue active)
Feb  8 15:29:45 Efendibey_Live postfix/bounce[18227]: E4F5F16A9: sender non-delivery notification: 468D216BC
Feb  8 15:29:45 Efendibey_Live postfix/qmgr[1193]: E4F5F16A9: removed
Feb  8 15:29:45 Efendibey_Live postfix/local[18228]: 468D216BC: to=, relay=local, delay=0.02, delays=0.01/0.01/0/0, dsn=2.0.0, status=sent (delivered to mailbox)
Feb  8 15:29:45 Efendibey_Live postfix/qmgr[1193]: 468D216BC: removed

I flush tried the -f legitimateemail@gmail.com option in mailx but still, no emails received .
here is my /etc/hosts entry

# cat /etc/hosts
127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4
::1         localhost localhost.localdomain localhost6 localhost6.localdomain6

127.0.0.1 guest
::1       guest

127.0.0.1 Efendibey_Live
::1       Efendibey_Live

Can you please suggest how can I get emails to work from my Linux horde ?

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