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Resolved one specific email address recieve message twice (sent from an app through the same server)

Alaa Mansour

Basic Pleskian
Hello everybody

so my server is (server.com)
and my client domain is (client.com)
app email address (app@client.com)

one of the persons in my client domain recive the email twice (double@client.com) he is in CC, the main target doesn't recieve it twice (target@client.com)
and not from all the parts of the app, just one part

i can't understand what is the problem.

Code:
TLS SNI server.com from unknown[188.11.98.82] not matched, using default chain
Jun  5 12:13:12 plesk postfix/smtpd[27660]: AF1A37AD: client=unknown[188.11.98.82], sasl_method=login, sasl_username=app@client.com
Jun  5 12:13:12 plesk postfix/cleanup[27527]: AF1A37AD: message-id=<>
Jun  5 12:13:13 plesk psa-pc-remote[25084]: handlers_stderr: PASS
Jun  5 12:13:13 plesk psa-pc-remote[25084]: PASS during call 'limit-out' handler
Jun  5 12:13:13 plesk check-quota[27666]: Starting the check-quota filter...
Jun  5 12:13:13 plesk psa-pc-remote[25084]: handlers_stderr: SKIP
Jun  5 12:13:13 plesk psa-pc-remote[25084]: SKIP during call 'check-quota' handler
Jun  5 12:13:13 plesk spf[27667]: Starting the spf filter...
Jun  5 12:13:13 plesk spf[27667]: SPF status: PASS
Jun  5 12:13:13 plesk psa-pc-remote[25084]: handlers_stderr: PASS
Jun  5 12:13:13 plesk psa-pc-remote[25084]: PASS during call 'spf' handler
Jun  5 12:13:13 plesk dk_sign[27668]: Starting the dk_sign filter...
Jun  5 12:13:13 plesk psa-pc-remote[25084]: handlers_stderr: PASS
Jun  5 12:13:13 plesk psa-pc-remote[25084]: PASS during call 'dd51-domainkeys' handler
Jun  5 12:13:13 plesk dk_sign[27669]: Starting the dk_sign filter...
Jun  5 12:13:13 plesk psa-pc-remote[25084]: handlers_stderr: PASS
Jun  5 12:13:13 plesk psa-pc-remote[25084]: PASS during call 'dd51-domainkeys' handler
Jun  5 12:13:13 plesk postfix/qmgr[67989]: AF1A37AD: from=<app@client.com>, size=528, nrcpt=2 (queue active)
Jun  5 12:13:13 plesk postfix-local[27670]: postfix-local: from=app@client.com, to=double@client.com, dirname=/var/qmail/mailnames
Jun  5 12:13:13 plesk postfix-local[27672]: postfix-local: from=app@client.com, to=target@client.com, dirname=/var/qmail/mailnames
Jun  5 12:13:13 plesk spamassassin[27673]: Starting the spamassassin filter...
Jun  5 12:13:13 plesk spamd[120013]: spamd: connection from 127.0.0.1 [127.0.0.1]:34130 to port 783, fd 6
Jun  5 12:13:13 plesk spamd[120013]: spamd: using default config for double@client.com: /var/qmail/mailnames/client.com/double/.spamassassin/user_prefs
Jun  5 12:13:13 plesk spamd[120013]: spamd: processing message (unknown) for double@client.com:30
Jun  5 12:13:13 plesk spamassassin[27675]: Starting the spamassassin filter...
Jun  5 12:13:13 plesk spamd[128908]: spamd: connection from 127.0.0.1 [127.0.0.1]:34132 to port 783, fd 6
Jun  5 12:13:13 plesk spamd[128908]: spamd: using default config for target@client.com: /var/qmail/mailnames/client.com/target/.spamassassin/user_prefs
Jun  5 12:13:13 plesk spamd[128908]: spamd: processing message (unknown) for target@client.com:30
Jun  5 12:13:13 plesk spamd[128908]: spamd: clean message (-1.1/7.0) for target@client.com:30 in 0.3 seconds, 1332 bytes.
Jun  5 12:13:13 plesk spamd[128908]: spamd: result: . -1 - ALL_TRUSTED,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,MISSING_MID,SPF_PASS,URIBL_BLOCKED scantime=0.3,size=1332,user=ma$
Jun  5 12:13:13 plesk spamd[120013]: spamd: clean message (-1.1/7.0) for double@client.com:30 in 0.3 seconds, 1332 bytes.
Jun  5 12:13:13 plesk spamd[120013]: spamd: result: . -1 - ALL_TRUSTED,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,MISSING_MID,SPF_PASS,URIBL_BLOCKED scantime=0.3,size=1332,user=lu$
Jun  5 12:13:13 plesk dk_check[27677]: Starting the dk_check filter...
Jun  5 12:13:13 plesk dk_check[27677]: DKIM verify result: Success
Jun  5 12:13:13 plesk dmarc[27679]: Starting the dmarc filter...
Jun  5 12:13:13 plesk dmarc[27679]: Store DKIM result for 'client.com' into DMARC library.
Jun  5 12:13:13 plesk dk_check[27678]: Starting the dk_check filter...
Jun  5 12:13:13 plesk dmarc[27679]: DMARC: PASS message for target@client.com
Jun  5 12:13:13 plesk postfix-local[27672]: deliveryManager: Get empty message id, delivery state will be disabled for this mail
Jun  5 12:13:13 plesk dk_check[27678]: DKIM verify result: Success
Jun  5 12:13:13 plesk dmarc[27681]: Starting the dmarc filter...
Jun  5 12:13:13 plesk dmarc[27681]: Store DKIM result for 'client.com' into DMARC library.
Jun  5 12:13:13 plesk dmarc[27681]: DMARC: PASS message for double@client.com
Jun  5 12:13:13 plesk postfix-local[27670]: deliveryManager: Get empty message id, delivery state will be disabled for this mail
Jun  5 12:13:13 plesk spamd[128906]: prefork: child states: BI
Jun  5 12:13:13 plesk dovecot: service=lda, user=target@client.com, ip=[]. sieve: msgid=unspecified: stored mail into mailbox 'INBOX'
Jun  5 12:13:13 plesk spamd[128906]: prefork: child states: II
Jun  5 12:13:13 plesk dovecot: service=lda, user=double@client.com, ip=[]. msgid=unspecified: saved mail to INBOX
Jun  5 12:13:13 plesk plesk sendmail[27688]: handlers_stderr: PASS
Jun  5 12:13:13 plesk plesk sendmail[27688]: PASS during call 'limit-out' handler
Jun  5 12:13:13 plesk plesk sendmail[27691]: handlers_stderr: PASS
Jun  5 12:13:13 plesk check-quota[27695]: Starting the check-quota filter...
Jun  5 12:13:13 plesk plesk sendmail[27688]: handlers_stderr: SKIP
Jun  5 12:13:13 plesk plesk sendmail[27688]: SKIP during call 'check-quota' handler
Jun  5 12:13:13 plesk plesk sendmail[27691]: PASS during call 'limit-out' handler
Jun  5 12:13:13 plesk dk_sign[27696]: Starting the dk_sign filter...
Jun  5 12:13:13 plesk check-quota[27697]: Starting the check-quota filter...
Jun  5 12:13:13 plesk plesk sendmail[27688]: handlers_stderr: PASS
Jun  5 12:13:13 plesk plesk sendmail[27688]: PASS during call 'dd51-domainkeys' handler
Jun  5 12:13:13 plesk plesk sendmail[27691]: handlers_stderr: SKIP
Jun  5 12:13:13 plesk plesk sendmail[27691]: SKIP during call 'check-quota' handler
Jun  5 12:13:13 plesk dk_sign[27701]: Starting the dk_sign filter...
Jun  5 12:13:13 plesk plesk sendmail[27691]: handlers_stderr: PASS
Jun  5 12:13:13 plesk plesk sendmail[27691]: PASS during call 'dd51-domainkeys' handler
Jun  5 12:13:13 plesk postfix/pickup[3714]: B08B4CEE: uid=30 from=<app@client.com>
Jun  5 12:13:13 plesk postfix/cleanup[27527]: B08B4CEE: message-id=<20200605101313.B08B4CEE@server.com>
Jun  5 12:13:13 plesk postfix/pipe[27535]: AF1A37AD: to=<double@client.com>, relay=plesk_virtual, delay=1.1, delays=0.47/0/0/0.6, dsn=2.0.0, status=sent (delivered via pl$
Jun  5 12:13:13 plesk psa-pc-remote[25084]: handlers_stderr: SKIP
Jun  5 12:13:13 plesk psa-pc-remote[25084]: SKIP during call 'limit-out' handler
Jun  5 12:13:13 plesk check-quota[27712]: Starting the check-quota filter...
Jun  5 12:13:13 plesk psa-pc-remote[25084]: handlers_stderr: SKIP
Jun  5 12:13:13 plesk psa-pc-remote[25084]: SKIP during call 'check-quota' handler
Jun  5 12:13:13 plesk spf[27713]: Starting the spf filter...
Jun  5 12:13:13 plesk spf[27713]: SPF result: pass
Jun  5 12:13:13 plesk spf[27713]: SPF status: PASS
Jun  5 12:13:13 plesk psa-pc-remote[25084]: handlers_stderr: PASS
Jun  5 12:13:13 plesk psa-pc-remote[25084]: PASS during call 'spf' handler
Jun  5 12:13:13 plesk plesk sendmail[27708]: handlers_stderr: PASS
Jun  5 12:13:13 plesk dk_sign[27714]: Starting the dk_sign filter...
Jun  5 12:13:13 plesk psa-pc-remote[25084]: handlers_stderr: PASS
Jun  5 12:13:13 plesk psa-pc-remote[25084]: PASS during call 'dd51-domainkeys' handler
Jun  5 12:13:13 plesk plesk sendmail[27708]: PASS during call 'limit-out' handler
Jun  5 12:13:13 plesk check-quota[27715]: Starting the check-quota filter...
Jun  5 12:13:13 plesk plesk sendmail[27708]: handlers_stderr: SKIP
Jun  5 12:13:13 plesk plesk sendmail[27708]: SKIP during call 'check-quota' handler
Jun  5 12:13:13 plesk dk_sign[27716]: Starting the dk_sign filter...
Jun  5 12:13:13 plesk plesk sendmail[27708]: handlers_stderr: PASS
Jun  5 12:13:13 plesk plesk sendmail[27708]: PASS during call 'dd51-domainkeys' handler
Jun  5 12:13:13 plesk postfix/qmgr[67989]: B08B4CEE: from=<app@client.com>, size=1930, nrcpt=1 (queue active)
Jun  5 12:13:13 plesk postfix/pickup[3714]: E89B0920: uid=30 from=<app@client.com>
Jun  5 12:13:13 plesk postfix/cleanup[27527]: E89B0920: message-id=<20200605101313.E89B0920@server.com>
Jun  5 12:13:13 plesk postfix-local[27721]: postfix-local: from=app@client.com, to=double@client.com, dirname=/var/qmail/mailnames
Jun  5 12:13:13 plesk spamassassin[27723]: Starting the spamassassin filter...
Jun  5 12:13:13 plesk spamd[120013]: spamd: connection from 127.0.0.1 [127.0.0.1]:34138 to port 783, fd 6
Jun  5 12:13:13 plesk spamd[120013]: spamd: using default config for double@client.com: /var/qmail/mailnames/client.com/double/.spamassassin/user_prefs
Jun  5 12:13:13 plesk spamd[120013]: spamd: processing message <20200605101313.B08B4CEE@server.com> for double@client.com:30
Jun  5 12:13:14 plesk spamd[120013]: spamd: clean message (-1.2/7.0) for double@client.com:30 in 0.1 seconds, 2020 bytes.
Jun  5 12:13:14 plesk spamd[120013]: spamd: result: . -1 - ALL_TRUSTED,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,SPF_PASS,URIBL_BLOCKED scantime=0.1,size=2020,user=double@cr$
Jun  5 12:13:14 plesk dk_check[27727]: Starting the dk_check filter...
Jun  5 12:13:14 plesk dk_check[27727]: DKIM verify result: Success
Jun  5 12:13:14 plesk dmarc[27728]: Starting the dmarc filter...
Jun  5 12:13:14 plesk dmarc[27728]: Store DKIM result for 'client.com' into DMARC library.
Jun  5 12:13:14 plesk dmarc[27728]: DMARC: PASS message for double@client.com
Jun  5 12:13:14 plesk spamd[128906]: prefork: child states: II
Jun  5 12:13:14 plesk dovecot: service=lda, user=double@client.com, ip=[]. msgid=<20200605101313.B08B4CEE@server.com>: saved mail to INBOX
 
it was a fault of the customer, he turned on email frwarding on Plesk also to forward the email, so this is why it arrives twice
 
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