System and Network configuration • Email server, sending email failure

Code:

Jan 26 17:26:09 mail.myserver.net postfix/pickup[6006]: 8482CFA1516: uid=0 from=<root>Jan 26 17:26:09 mail.myserver.net postfix/cleanup[6329]: 8482CFA1516: message-id=<s5vzqsi6zfmn3nycwgrtxvrjhkzb72leqzjeenjwltljxyad2x@geske64iu5aa>Jan 26 17:26:09 mail.myserver.net opendkim[1547]: 8482CFA1516: DKIM-Signature field added (s=default, d=myserver.net)Jan 26 17:26:09 mail.myserver.net postfix/qmgr[5652]: 8482CFA1516:from=<root@myserver.net>, size=525, nrcpt=1 (queue active)Jan 26 17:26:39 mail.myserver.net postfix/smtp[6297]: connect to mta5.am0.yahoodns.net[67.195.228.94]:25: Connection timed outJan 26 17:27:09 mail.myserver.net postfix/smtp[6297]: connect to mta5.am0.yahoodns.net[67.195.204.74]:25: Connection timed outJan 26 17:27:39 mail.myserver.net postfix/smtp[6297]: connect to mta6.am0.yahoodns.net[98.136.96.74]:25: Connection timed outJan 26 17:28:09 mail.myserver.net postfix/smtp[6297]: connect to mta7.am0.yahoodns.net[67.195.228.106]:25: Connection timed outJan 26 17:28:39 mail.myserver.net postfix/smtp[6297]: connect to mta6.am0.yahoodns.net[67.195.228.111]:25: Connection timed outJan 26 17:28:39 mail.myserver.net postfix/smtp[6297]: 8482CFA1516: to=<user@yahoo.com>, relay=none, delay=150, delays=0.19/0/150/0, dsn=4.4.1, status=deferred (connect to mta6.am0.yahoodns.net[67.195.228.111]:25: Connection timed out)Jan 26 17:33:37 mail.myserver.net postfix/qmgr[5652]: A4DE6FA14D0: from=<user@myserver.net>, size=632, nrcpt=1 (queue active)Jan 26 17:34:07 mail.myserver.net postfix/smtp[6340]: connect to mta5.am0.yahoodns.net[67.195.228.111]:25: Connection timed outJan 26 17:34:37 mail.myserver.net postfix/smtp[6340]: connect to mta5.am0.yahoodns.net[98.136.96.74]:25: Connection timed outJan 26 17:35:07 mail.myserver.net postfix/smtp[6340]: connect to mta7.am0.yahoodns.net[67.195.204.74]:25: Connection timed outJan 26 17:35:37 mail.myserver.net postfix/smtp[6340]: connect to mta5.am0.yahoodns.net[67.195.204.77]:25: Connection timed outJan 26 17:36:07 mail.myserver.net postfix/smtp[6340]: connect to mta6.am0.yahoodns.net[98.136.96.75]:25: Connection timed outJan 26 17:36:07 mail.myserver.net postfix/smtp[6340]: A4DE6FA14D0: to=<user@yahoo.com>, relay=none, delay=1580, delays=1430/0.02/150/0, dsn=4.4.1, status=deferred (connect to mta6.am0.yahoodns.net[98.136.96.75]:25: Connection timed out

Code:

Jan 26 17:46:31 mail.myserver.net postfix/pickup[6006]: 2CE5AFA1664: uid=0 from=<root>Jan 26 17:46:31 mail.myserver.net postfix/cleanup[6409]: 2CE5AFA1664: message-id=<c5ccwulsbeqatx3ug2tltcfywqlcxca2hgqcfg4jicfux2gffw@tqvktnsu6d2r>Jan 26 17:46:31 mail.myserver.net opendkim[1547]: 2CE5AFA1664: DKIM-Signature field added (s=default, d=myserver.net)Jan 26 17:46:31 mail.myserver.net postfix/qmgr[5652]: 2CE5AFA1664: from=<root@myserver.net>, size=540, nrcpt=1 (queue active)Jan 26 17:46:31 mail.myserver.net postfix/smtp[6366]: Trusted TLS connection established to gmail-smtp-in.l.google.com[2a00:1450:4025:401::1b]:25: TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256Jan 26 17:46:32 mail.myserver.net postfix/smtp[6366]: 2CE5AFA1664: to=<user@gmail.com>, relay=gmail-smtp-in.l.google.com[2a00:1450:4025:401::1b]:25, delay=0.89, delays=0.15/0/0.33/0.41, dsn=5.7.1, status=bounced (host gmail-smtp-in.l.google.com[2a00:1450:4025:401::1b] said: 550-5.7.1 [2001:b07:5d33:2416:5f90:9f37:a6a:3f42] The IP you're using to send 550-5.7.1 mail is not authorized to send email directly to our servers. Please 550-5.7.1 use the SMTP relay at your service provider instead. For more 550-5.7.1 information, go to 550 5.7.1  https://support.google.com/mail/?p=NotAuthorizedError 4fb4d7f45d1cf-5dc186df77bsi4442016a12.552 - gsmtp (in reply to end of DATA command))Jan 26 17:46:32 mail.myserver.net postfix/bounce[6411]: 2CE5AFA1664: sender non-delivery notification: 1349CFA1686Jan 26 17:46:32 mail.myserver.net postfix/qmgr[5652]: 2CE5AFA1664: removed