root@mail:~# sudo tail -f /var/log/mail.log
Apr 8 16:31:17 mail postfix/postfix-script[3010]: starting the Postfix mail system
Apr 8 16:31:17 mail postfix/master[3012]: daemon started -- version 3.6.4, configuration /etc/postfix
Apr 8 16:32:17 mail postfix/postscreen[3111]: CONNECT from [62.164.153.49]:52980 to [66.135.30.122]:25
Apr 8 16:32:23 mail postfix/postscreen[3111]: PASS NEW [62.164.153.49]:52980
Apr 8 16:32:23 mail postfix/smtpd[3114]: connect from uniform.egr.mxascen.com[62.164.153.49]
Apr 8 16:32:23 mail postfix/smtpd[3114]: discarding EHLO keywords: CHUNKING
Apr 8 16:32:23 mail postfix/smtpd[3114]: Anonymous TLS connection established from uniform.egr.mxascen.com[62.164.153.49]: TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-256) server-digest SHA256
Apr 8 16:32:23 mail postfix/smtpd[3114]: discarding EHLO keywords: CHUNKING
Apr 8 16:32:23 mail postfix/smtpd[3114]: NOQUEUE: reject: RCPT from uniform.egr.mxascen.com[62.164.153.49]: 550 5.1.1 <kaushik@joinarenawork.com>: Recipient address rejected: User unknown; from=<josh@mail.thesevenclay.com> to=<kaushik@joinarenawork.com> proto=ESMTP helo=<uniform.egr.mxascen.com>
Apr 8 16:32:23 mail postfix/smtpd[3114]: disconnect from uniform.egr.mxascen.com[62.164.153.49] ehlo=2 starttls=1 mail=1 rcpt=0/1 quit=1 commands=5/6
Apr 8 16:34:36 mail postfix/submission/smtpd[3272]: connect from localhost[127.0.0.1]
Apr 8 16:34:36 mail postfix/submission/smtpd[3272]: discarding EHLO keywords: CHUNKING
Apr 8 16:34:36 mail postfix/submission/smtpd[3272]: Anonymous TLS connection established from localhost[127.0.0.1]: TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-256) server-digest SHA256
Apr 8 16:34:36 mail postfix/submission/smtpd[3272]: discarding EHLO keywords: CHUNKING
Apr 8 16:34:37 mail postfix/submission/smtpd[3272]: 4ZXBW103FxzRZkC: client=localhost[127.0.0.1], sasl_method=LOGIN, sasl_username=hello@joinarenawork.com
Apr 8 16:34:37 mail postfix/cleanup[3277]: 4ZXBW103FxzRZkC: message-id=<93eac088b5f0d515afbf2404288d2a0c@joinarenawork.com>
Apr 8 16:34:37 mail postfix/qmgr[3018]: 4ZXBW103FxzRZkC: from=<hello@joinarenawork.com>, size=590, nrcpt=1 (queue active)
Apr 8 16:34:37 mail roundcube: <pcrmpe1n> User hello@joinarenawork.com [223.233.80.158]; Message <93eac088b5f0d515afbf2404288d2a0c@joinarenawork.com> for shwetasdhake16@gmail.com; 250: 2.0.0 Ok: queued as 4ZXBW103FxzRZkC
Apr 8 16:34:37 mail postfix/submission/smtpd[3272]: disconnect from localhost[127.0.0.1] ehlo=2 starttls=1 auth=1 mail=1 rcpt=1 data=1 quit=1 commands=8
Apr 8 16:34:37 mail postfix/10025/smtpd[3287]: connect from localhost[127.0.0.1]
Apr 8 16:34:37 mail postfix/10025/smtpd[3287]: discarding EHLO keywords: CHUNKING
Apr 8 16:34:37 mail postfix/10025/smtpd[3287]: 4ZXBW12bRhzRZkM: client=localhost[127.0.0.1]
Apr 8 16:34:37 mail postfix/cleanup[3277]: 4ZXBW12bRhzRZkM: message-id=<93eac088b5f0d515afbf2404288d2a0c@joinarenawork.com>
Apr 8 16:34:37 mail postfix/qmgr[3018]: 4ZXBW12bRhzRZkM: from=<hello@joinarenawork.com>, size=1897, nrcpt=1 (queue active)
Apr 8 16:34:37 mail amavis[2513]: (02513-01) Passed CLEAN {RelayedInternal}, ORIGINATING/MYNETS LOCAL [127.0.0.1]:40328 ESMTP/ESMTP <hello@joinarenawork.com> -> <shwetasdhake16@gmail.com>, (), Queue-ID: 4ZXBW103FxzRZkC, Message-ID: <93eac088b5f0d515afbf2404288d2a0c@joinarenawork.com>, mail_id: 5RRQ4t2PR7f6, b: yGXMAEpdE, Hits: -1, size: 590, queued_as: 4ZXBW12bRhzRZkM, Subject: "Test Email", From: <hello@joinarenawork.com>, User-Agent: Roundcube_Webmail, helo=localhost, Tests: [ALL_TRUSTED=-1], autolearn=ham autolearn_force=no, autolearnscore=0, dkim_new=dkim:joinarenawork.com, 258 ms
Apr 8 16:34:37 mail postfix/10025/smtpd[3287]: disconnect from localhost[127.0.0.1] ehlo=1 mail=1 rcpt=1 data=1 quit=1 commands=5
Apr 8 16:34:37 mail postfix/amavis/smtp[3282]: 4ZXBW103FxzRZkC: to=<shwetasdhake16@gmail.com>, relay=127.0.0.1[127.0.0.1]:10026, delay=0.4, delays=0.07/0.06/0.01/0.26, 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 4ZXBW12bRhzRZkM)
Apr 8 16:34:37 mail postfix/qmgr[3018]: 4ZXBW103FxzRZkC: removed
Apr 8 16:34:37 mail postfix/smtp[3288]: connect to gmail-smtp-in.l.google.com[2607:f8b0:4004:c19::1b]:25: Network is unreachable