Here's my log of tail -f /var/log/mail.log when I tryed to send and email for the invalid adress kjahsgdf@lkjsahfg.kjh.br.
May 16 16:42:22 vps23593 postfix/anvil[3611]: statistics: max connection rate 1/60s for (submission:193.56.29.237) at May 16 16:33:17
May 16 16:42:22 vps23593 postfix/anvil[3611]: statistics: max connection count 1 for (submission:193.56.29.237) at May 16 16:33:17
May 16 16:42:22 vps23593 postfix/anvil[3611]: statistics: max cache size 1 at May 16 16:33:17
May 16 16:42:27 vps23593 roundcube: <nc0ob5mp> Successful login for marketing@botboutique.com.br (ID: 2) from 177.55.160.138 in session nc0ob5mp0llvh77k
May 16 16:43:16 vps23593 postfix/submission/smtpd[3609]: warning: hostname 28.69.103-113.in-addr.arpa does not resolve to address 103.69.28.113: Name or service not known
May 16 16:43:16 vps23593 postfix/submission/smtpd[3609]: connect from unknown[103.69.28.113]
May 16 16:43:18 vps23593 postfix/submission/smtpd[3609]: disconnect from unknown[103.69.28.113] ehlo=1 auth=0/1 rset=0/1 quit=1 commands=2/4
May 16 16:43:23 vps23593 postfix/submission/smtpd[3609]: warning: hostname 28.69.103-113.in-addr.arpa does not resolve to address 103.69.28.113: Name or service not known
May 16 16:43:23 vps23593 postfix/submission/smtpd[3609]: connect from unknown[103.69.28.113]
May 16 16:43:23 vps23593 postfix/submission/smtpd[11416]: warning: hostname 28.69.103-113.in-addr.arpa does not resolve to address 103.69.28.113: Name or service not known
May 16 16:43:23 vps23593 postfix/submission/smtpd[11416]: connect from unknown[103.69.28.113]
May 16 16:43:24 vps23593 postfix/submission/smtpd[11421]: connect from localhost[127.0.0.1]
May 16 16:43:24 vps23593 postfix/submission/smtpd[11421]: 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 RSA-PSS (2048 bits) server-digest SHA256
May 16 16:43:24 vps23593 postfix/submission/smtpd[3609]: disconnect from unknown[103.69.28.113] ehlo=1 auth=0/1 rset=0/1 quit=1 commands=2/4
May 16 16:43:24 vps23593 postfix/submission/smtpd[11421]: 4L24nS6JzKz612P: client=localhost[127.0.0.1], sasl_method=LOGIN, sasl_username=marketing@botboutique.com.br
May 16 16:43:24 vps23593 postfix/cleanup[11436]: 4L24nS6JzKz612P: message-id=<89ad4a884815edef414a6f2ced8018d9@botboutique.com.br>
May 16 16:43:24 vps23593 postfix/qmgr[3056]: 4L24nS6JzKz612P: from=<marketing@botboutique.com.br>, size=597, nrcpt=1 (queue active)
May 16 16:43:24 vps23593 roundcube: <nc0ob5mp> User marketing@botboutique.com.br [177.55.160.138]; Message <89ad4a884815edef414a6f2ced8018d9@botboutique.com.br> for kjahsgdf@lkjsahfg.kjh.br; 250: 2.0.0 Ok: queued as 4L24nS6JzKz612P
May 16 16:43:24 vps23593 postfix/submission/smtpd[11421]: disconnect from localhost[127.0.0.1] ehlo=2 starttls=1 auth=1 mail=1 rcpt=1 data=1 quit=1 commands=8
May 16 16:43:25 vps23593 postfix/submission/smtpd[11416]: disconnect from unknown[103.69.28.113] ehlo=1 auth=0/1 rset=0/1 quit=1 commands=2/4
May 16 16:43:25 vps23593 postfix/10025/smtpd[11453]: connect from localhost[127.0.0.1]
May 16 16:43:25 vps23593 postfix/10025/smtpd[11453]: 4L24nT5SnBz612T: client=localhost[127.0.0.1]
May 16 16:43:25 vps23593 postfix/cleanup[11436]: 4L24nT5SnBz612T: message-id=<89ad4a884815edef414a6f2ced8018d9@botboutique.com.br>
May 16 16:43:25 vps23593 postfix/qmgr[3056]: 4L24nT5SnBz612T: from=<marketing@botboutique.com.br>, size=1926, nrcpt=1 (queue active)
May 16 16:43:25 vps23593 postfix/10025/smtpd[11453]: disconnect from localhost[127.0.0.1] ehlo=1 mail=1 rcpt=1 data=1 quit=1 commands=5
May 16 16:43:25 vps23593 amavis[2772]: (02772-01) Passed CLEAN {RelayedInternal}, ORIGINATING/MYNETS LOCAL [127.0.0.1]:53980 ESMTP/ESMTP <marketing@botboutique.com.br> -> <kjahsgdf@lkjsahfg.kjh.br>, (), Queue-ID: 4L24nS6JzKz612P, Message-ID: <89ad4a884815edef414a6f2ced8018d9@botboutique.com.br>, mail_id: nKxHltDM5jpF, b: 58WbZIj2C, Hits: -1.01, size: 597, queued_as: 4L24nT5SnBz612T, Subject: "Testeeeeeeeeeeeeee", From: <marketing@botboutique.com.br>, User-Agent: Roundcube_Webmail, helo=localhost, Tests: [ALL_TRUSTED=-1,T_SCC_BODY_TEXT_LINE=-0.01], autolearn=ham autolearn_force=no, autolearnscore=-0.01, dkim_new=dkim:botboutique.com.br, 762 ms
May 16 16:43:25 vps23593 postfix/amavis/smtp[11441]: 4L24nS6JzKz612P: to=<kjahsgdf@lkjsahfg.kjh.br>, relay=127.0.0.1[127.0.0.1]:10026, delay=1.1, delays=0.28/0.07/0.01/0.77, 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 4L24nT5SnBz612T)
May 16 16:43:25 vps23593 postfix/qmgr[3056]: 4L24nS6JzKz612P: removed
May 16 16:43:26 vps23593 postfix/smtp[11454]: Trusted TLS connection established to smtp.sendgrid.net[167.89.115.18]:587: TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)
May 16 16:43:27 vps23593 postfix/smtp[11454]: 4L24nT5SnBz612T: to=<kjahsgdf@lkjsahfg.kjh.br>, relay=smtp.sendgrid.net[167.89.115.18]:587, delay=1.8, delays=0.02/0.03/1.4/0.31, dsn=2.0.0, status=sent (250 Ok: queued as PVqi8uSMTg-8KfAVef7UAw)
May 16 16:43:27 vps23593 postfix/qmgr[3056]: 4L24nT5SnBz612T: removed
May 16 16:43:30 vps23593 postfix/submission/smtpd[3609]: connect from unknown[193.56.29.237]
May 16 16:43:32 vps23593 postfix/submission/smtpd[3609]: disconnect from unknown[193.56.29.237] ehlo=1 auth=0/1 rset=0/1 quit=1 commands=2/4