Wednesday, June 11, 2025

blogger.com DELIVERY FAILURE: Undelivered Mail Returned to Sender 

  from: MAILER-DAEMON@mailcluster12.https://www.blogger.com/check-activity/ (Mail Delivery Subsystem)  Subject: Undelivered Mail Returned to Sender  Date: 6/12/2025 1:58:50 a.m. +0000 (UTC)  To: rtg@astrosystem.eu Auto-Submitted: auto-replied (mailer-daemon)  X-Failed-Recipients:   X-Original-Message-ID:     ------[ PERMANENT DELIVERY FAILURE NOTIFICATION ]------    The following message could not be delivered to one or more recipients.    Permanent failure details:  - Recipient: <>  - Reason: 550 5.1.1 User unknown (no such address)  - Remote MTA:https://www.blogger.com/check-activity/ [192.0.2.89]  - Diagnostic: SMTP error from remote server after RCPT TO:<>  - Action: Failed (message will not be retried)  - Status: 5.1.1 (Permanent non-delivery)  - Queue-ID: 9A3B21C0042  - Delivery-Attempts: 3  - Last-Attempt: 6/12/2025 1:58:50 a.m. +0000    
          
        ------[ EXTENDED TECHNICAL DIAGNOSTICS ]------    2025-04-15T14:32:42.112Z [SMTP] IN: EHLO mail-sender.example.com  2025-04-15T14:32:42.115Z [SMTP] OUT: 250-mailcluster12.backbone.example.net  2025-04-15T14:32:42.115Z [SMTP] OUT: 250-PIPELINING  2025-04-15T14:32:42.115Z [SMTP] OUT: 250-SIZE 52428800  2025-04-15T14:32:42.115Z [SMTP] OUT: 250-VRFY  2025-04-15T14:32:42.115Z [SMTP] OUT: 250-ETRN  2025-04-15T14:32:42.115Z [SMTP] OUT: 250-STARTTLS  2025-04-15T14:32:42.115Z [SMTP] OUT: 250-ENHANCEDSTATUSCODES  2025-04-15T14:32:42.115Z [SMTP] OUT: 250-8BITMIME  2025-04-15T14:32:42.115Z [SMTP] OUT: 250 DSN  2025-04-15T14:32:42.117Z [SMTP] IN: MAIL FROM: SIZE=12568  2025-04-15T14:32:42.120Z [SMTP] OUT: 250 2.1.0 Ok  2025-04-15T14:32:42.123Z [SMTP] IN: RCPT TO:<>  2025-04-15T14:32:42.452Z [SMTP] OUT: 550 5.1.1 <>: Recipient address rejected: User unknown in virtual mailbox table  2025-04-15T14:32:42.455Z [SMTP] IN: RSET  2025-04-15T14:32:42.457Z [SMTP] OUT: 250 2.0.0 Reset state  2025-04-15T14:32:42.459Z [SMTP] IN: QUIT  2025-04-15T14:32:42.460Z [SMTP] OUT: 221 2.0.0 Bye    ------[ MESSAGE ROUTING TRACE ]------    Received: from mail-sender.example.com (mail-sender.example.com [192.0.2.17]) (authenticated bits=0) by mailcluster12.backbone.example.net (8.17.1/8.17.1) with ESMTP id 9A3B21C0042 for <>; Mon, 15 Apr 2025 14:32:45 +0000 (UTC)  Received: from [192.168.1.105] (client-42-192-78-123.example.com [42.192.78.123]) by mail-sender.example.com (Postfix) with ESMTPSA id 3D4F2B1000F for <>; Mon, 15 Apr 2025 14:32:42 +0000 (UTC)  X-Originating-IP: [42.192.78.123]  X-Mailer: Microsoft Outlook 16.0 (Build 14326.20404)  X-Authenticated-User: sender@example.com  X-Spam-Score: 0.2  X-Virus-Scanned: by ClamAV 0.103.4/26710/Tue Apr 14 07:21:01 2025  X-Received-SPF: pass (mail-sender.example.com: domain of sender@example.com designates 192.0.2.17 as permitted sender) client-ip=192.0.2.17;  X-DKIM-Status: pass (2048-bit RSA key) header.d=example.com  X-DMARC-Status: pass (policy=none)    ------[ ORIGINAL MESSAGE HEADERS ]------    Return-Path:   Delivered-To:   Date: Mon, 15 Apr 2025 14:32:45 +0000  From: John Doe   To: Project Team <>  Message-ID:   Subject: Urgent: Q2 Financial Report Review  MIME-Version: 1.0  Content-Type: multipart/mixed; boundary="----=_NextPart_000_001A_01DA1832.7F8C3D70"  X-Priority: 1 (Highest)  Importance: high  X-MSMail-Priority: High    [Message truncated at 2048 bytes - full message available in detailed view]    ------[ TECHNICAL DIAGNOSTICS LOOP 1/∞ ]------    [SMTP PROTOCOL EXCHANGE - DETAILED ATTEMPT 1]  2025-04-15T14:32:42.000001Z [CONN] Opening connection to RCPT TO:<>  2025-04-15T14:32:42.000234Z [CONN] TCP handshake initiated  2025-04-15T14:32:42.042156Z [CONN] Connection established from 192.0.2.17:47823  2025-04-15T14:32:42.042298Z [SMTP] OUT: 220 mx3.example.org ESMTP Postfix (Ubuntu)  2025-04-15T14:32:42.112000Z [SMTP] IN: EHLO mail-sender.example.com  2025-04-15T14:32:42.112123Z [SMTP] Processing EHLO command  2025-04-15T14:32:42.115000Z [SMTP] OUT: 250-mailcluster12.backbone.example.net  2025-04-15T14:32:42.115001Z [SMTP] OUT: 250-PIPELINING  2025-04-15T14:32:42.115002Z [SMTP] OUT: 250-SIZE 52428800  2025-04-15T14:32:42.115003Z [SMTP] OUT: 250-VRFY  2025-04-15T14:32:42.115004Z [SMTP] OUT: 250-ETRN  2025-04-15T14:32:42.115005Z [SMTP] OUT: 250-STARTTLS  2025-04-15T14:32:42.115006Z [SMTP] OUT: 250-ENHANCEDSTATUSCODES  2025-04-15T14:32:42.115007Z [SMTP] OUT: 250-8BITMIME  2025-04-15T14:32:42.115008Z [SMTP] OUT: 250 DSN  2025-04-15T14:32:42.117000Z [SMTP] IN: MAIL FROM: SIZE=12568  2025-04-15T14:32:42.117234Z [SMTP] Validating sender address  2025-04-15T14:32:42.120000Z [SMTP] OUT: 250 2.1.0 Ok  2025-04-15T14:32:42.123000Z [SMTP] IN: RCPT TO:<>  2025-04-15T14:32:42.123456Z [SMTP] Looking up recipient in virtual mailbox table  2025-04-15T14:32:42.451892Z [SMTP] Recipient lookup failed: no such user  2025-04-15T14:32:42.452000Z [SMTP] OUT: 550 5.1.1 <>: Recipient address rejected: User unknown in virtual mailbox table  2025-04-15T14:32:42.455000Z [SMTP] IN: RSET  2025-04-15T14:32:42.457000Z [SMTP] OUT: 250 2.0.0 Reset state  2025-04-15T14:32:42.459000Z [SMTP] IN: QUIT  2025-04-15T14:32:42.460000Z [SMTP] OUT: 221 2.0.0 Bye  2025-04-15T14:32:42.461000Z [CONN] Connection closed    [SYSTEM RESOURCE MONITORING - CYCLE 1]  2025-04-15T14:32:42.462000Z CPU: 12.4% user, 3.2% system, 84.4% idle  2025-04-15T14:32:42.463000Z MEM: 4.2GB/16GB (26.25%) BUFFER: 142MB CACHE: 2.1GB  2025-04-15T14:32:42.464000Z SWAP: 0B/4.0GB (0.00%) DISK: 23% used (142.1GB/600GB)  2025-04-15T14:32:42.465000Z LOAD: 1.42 (1min) 1.35 (5min) 1.28 (15min)  2025-04-15T14:32:42.466000Z PROCS: 142 running, 235 sleeping, 12 zombie  2025-04-15T14:32:42.467000Z DISK IO: read 142MB/s, write 42MB/s  2025-04-15T14:32:42.468000Z NET: in 12Mbps, out 8Mbps, errors 0, drops 2  2025-04-15T14:32:42.469000Z MTA QUEUE: 142 messages (42 deferred, 12 active, 88 delivered)    [NETWORK DIAGNOSTICS - DETAILED TRACE]  2025-04-15T14:32:42.470000Z PING mx3.example.org (192.0.2.89): 56 data bytes  2025-04-15T14:32:42.471000Z 64 bytes from 192.0.2.89: icmp_seq=0 ttl=57 time=42.123 ms  2025-04-15T14:32:42.472000Z 64 bytes from 192.0.2.89: icmp_seq=1 ttl=57 time=41.987 ms  2025-04-15T14:32:42.473000Z 64 bytes from 192.0.2.89: icmp_seq=2 ttl=57 time=43.112 ms  2025-04-15T14:32:42.474000Z 64 bytes from 192.0.2.89: icmp_seq=3 ttl=57 time=42.876 ms  2025-04-15T14:32:42.475000Z --- mx3.example.org ping statistics ---  2025-04-15T14:32:42.476000Z 4 packets transmitted, 4 received, 0% packet loss  2025-04-15T14:32:42.477000Z round-trip min/avg/max = 41.987/42.524/43.112 ms  2025-04-15T14:32:42.478000Z TRACEROUTE to mx3.example.org (192.0.2.89)  2025-04-15T14:32:42.479000Z 1 gateway.example.net (192.168.1.1) 0.512 ms  2025-04-15T14:32:42.480000Z 2 core-router-1.example.net (203.0.113.1) 2.112 ms  2025-04-15T14:32:42.481000Z 3 backbone-ix.example.net (198.51.100.1) 12.421 ms  2025-04-15T14:32:42.482000Z 4 mx3.example.org (192.0.2.89) 42.123 ms    [SECURITY SCAN RESULTS - COMPREHENSIVE]  2025-04-15T14:32:42.490000Z SPF: Checking sender policy framework  2025-04-15T14:32:42.491000Z SPF: v=spf1 include:_spf.example.com ~all  2025-04-15T14:32:42.492000Z SPF: PASS (sender@example.com from 192.0.2.17)  2025-04-15T14:32:42.493000Z DKIM: Verifying signature  2025-04-15T14:32:42.494000Z DKIM: v=1; a=rsa-sha256; d=example.com; s=default  2025-04-15T14:32:42.495000Z DKIM: PASS (2048-bit RSA key verified)  2025-04-15T14:32:42.496000Z DMARC: Checking alignment  2025-04-15T14:32:42.497000Z DMARC: v=DMARC1; p=none; rua=mailto:dmarc@example.com  2025-04-15T14:32:42.498000Z DMARC: PASS (policy=none, alignment=strict)  2025-04-15T14:32:42.499000Z SPAM: Analyzing content with SpamAssassin  2025-04-15T14:32:42.500000Z SPAM: Score breakdown: BAYES_00=-1.9, SPF_PASS=-0.1, DKIM_VALID=-0.1  2025-04-15T14:32:42.501000Z SPAM: Final score: -2.1/5.0 (HAM)  2025-04-15T14:32:42.502000Z VIRUS: ClamAV engine initialization  2025-04-15T14:32:42.503000Z VIRUS: Scanning 12568 bytes  2025-04-15T14:32:42.504000Z VIRUS: No threats detected  2025-04-15T14:32:42.505000Z URL-SCAN: Extracting URLs from message body  2025-04-15T14:32:42.506000Z URL-SCAN: No URLs found in message content  2025-04-15T14:32:42.507000Z HEADER-CHECK: Analyzing message headers  2025-04-15T14:32:42.508000Z HEADER-CHECK: No injection attempts detected  2025-04-15T14:32:42.509000Z CONTENT-FILTER: Final verdict: CLEAN (score: -2.1)    [QUEUE MANAGEMENT DETAILS]  2025-04-15T14:32:42.510000Z QUEUE: Message 9A3B21C0042 processing status  2025-04-15T14:32:42.511000Z QUEUE: Priority: NORMAL (5)  2025-04-15T14:32:42.512000Z QUEUE: Size: 12568 bytes  2025-04-15T14:32:42.513000Z QUEUE: Age: 0h 0m 3s  2025-04-15T14:32:42.514000Z QUEUE: Attempts: 1/3  2025-04-15T14:32:42.515000Z QUEUE: Next retry: +2h (exponential backoff)  2025-04-15T14:32:42.516000Z QUEUE: Recipient status: FAILED  2025-04-15T14:32:42.517000Z QUEUE: Bounce generated: YES  2025-04-15T14:32:42.518000Z QUEUE: DSN required: YES  Message truncated at 2048 bytes - full message available in detailed view]    ------[ TECHNICAL DIAGNOSTICS LOOP 1/∞ ]------    [SMTP PROTOCOL EXCHANGE - DETAILED ATTEMPT 1]  2025-04-15T14:32:42.000001Z [CONN] Opening connection to mx3.example.org:25  2025-04-15T14:32:42.000234Z [CONN] TCP handshake initiated  2025-04-15T14:32:42.042156Z [CONN] Connection established from 192.0.2.17:47823  2025-04-15T14:32:42.042298Z [SMTP] OUT: 220 mx3.example.org ESMTP Postfix (Ubuntu)  2025-04-15T14:32:42.112000Z [SMTP] IN: EHLO mail-sender.example.com  2025-04-15T14:32:42.112123Z [SMTP] Processing EHLO command  2025-04-15T14:32:42.115000Z [SMTP] OUT: 250-mailcluster12.backbone.example.net  2025-04-15T14:32:42.115001Z [SMTP] OUT: 250-PIPELINING  2025-04-15T14:32:42.115002Z [SMTP] OUT: 250-SIZE 52428800  2025-04-15T14:32:42.115003Z [SMTP] OUT: 250-VRFY  2025-04-15T14:32:42.115004Z [SMTP] OUT: 250-ETRN  2025-04-15T14:32:42.115005Z [SMTP] OUT: 250-STARTTLS  2025-04-15T14:32:42.115006Z [SMTP] OUT: 250-ENHANCEDSTATUSCODES  2025-04-15T14:32:42.115007Z [SMTP] OUT: 250-8BITMIME  2025-04-15T14:32:42.115008Z [SMTP] OUT: 250 DSN  2025-04-15T14:32:42.117000Z [SMTP] IN: MAIL FROM: SIZE=12568  2025-04-15T14:32:42.117234Z [SMTP] Validating sender address  2025-04-15T14:32:42.120000Z [SMTP] OUT: 250 2.1.0 Ok  2025-04-15T14:32:42.123000Z [SMTP] IN: RCPT TO:  2025-04-15T14:32:42.123456Z [SMTP] Looking up recipient in virtual mailbox table  2025-04-15T14:32:42.451892Z [SMTP] Recipient lookup failed: no such user  2025-04-15T14:32:42.452000Z [SMTP] OUT: 550 5.1.1 : Recipient address rejected: User unknown in virtual mailbox table  2025-04-15T14:32:42.455000Z [SMTP] IN: RSET  2025-04-15T14:32:42.457000Z [SMTP] OUT: 250 2.0.0 Reset state  2025-04-15T14:32:42.459000Z [SMTP] IN: QUIT  2025-04-15T14:32:42.460000Z [SMTP] OUT: 221 2.0.0 Bye  2025-04-15T14:32:42.461000Z [CONN] Connection closed    [SYSTEM RESOURCE MONITORING - CYCLE 1]  2025-04-15T14:32:42.462000Z CPU: 12.4% user, 3.2% system, 84.4% idle  2025-04-15T14:32:42.463000Z MEM: 4.2GB/16GB (26.25%) BUFFER: 142MB CACHE: 2.1GB  2025-04-15T14:32:42.464000Z SWAP: 0B/4.0GB (0.00%) DISK: 23% used (142.1GB/600GB)  2025-04-15T14:32:42.465000Z LOAD: 1.42 (1min) 1.35 (5min) 1.28 (15min)  2025-04-15T14:32:42.466000Z PROCS: 142 running, 235 sleeping, 12 zombie  2025-04-15T14:32:42.467000Z DISK IO: read 142MB/s, write 42MB/s  2025-04-15T14:32:42.468000Z NET: in 12Mbps, out 8Mbps, errors 0, drops 2  2025-04-15T14:32:42.469000Z MTA QUEUE: 142 messages (42 deferred, 12 active, 88 delivered)    [DNS RESOLUTION TRACE]  2025-04-15T14:32:42.470000Z DNS: Resolving mx3.example.org  2025-04-15T14:32:42.471000Z DNS: Query type A for mx3.example.org  2025-04-15T14:32:42.472000Z DNS: Server 8.8.8.8 responded with 192.0.2.89  2025-04-15T14:32:42.473000Z DNS: Query type MX for example.org  2025-04-15T14:32:42.474000Z DNS: MX records: 10 mx1.example.org, 20 mx2.example.org, 30 mx3.example.org  2025-04-15T14:32:42.475000Z DNS: Reverse lookup for 192.0.2.89  2025-04-15T14:32:42.476000Z DNS: PTR record: mx3.example.org    [NETWORK DIAGNOSTICS - DETAILED TRACE]  2025-04-15T14:32:42.477000Z PING mx3.example.org (192.0.2.89): 56 data bytes  2025-04-15T14:32:42.478000Z 64 bytes from 192.0.2.89: icmp_seq=0 ttl=57 time=42.123 ms  2025-04-15T14:32:42.479000Z 64 bytes from 192.0.2.89: icmp_seq=1 ttl=57 time=41.987 ms  2025-04-15T14:32:42.480000Z 64 bytes from 192.0.2.89: icmp_seq=2 ttl=57 time=43.112 ms  2025-04-15T14:32:42.481000Z 64 bytes from 192.0.2.89: icmp_seq=3 ttl=57 time=42.876 ms  2025-04-15T14:32:42.482000Z --- mx3.example.org ping statistics ---  2025-04-15T14:32:42.483000Z 4 packets transmitted, 4 received, 0% packet loss  2025-04-15T14:32:42.484000Z round-trip min/avg/max = 41.987/42.524/43.112 ms  2025-04-15T14:32:42.485000Z TRACEROUTE to RCPT TO:<>(192.0.2.89)  2025-04-15T14:32:42.486000Z 1 gateway.example.net (192.168.1.1) 0.512 ms  2025-04-15T14:32:42.487000Z 2 core-router-1.example.net (203.0.113.1) 2.112 ms  2025-04-15T14:32:42.488000Z 3 backbone-ix.example.net (198.51.100.1) 12.421 ms  2025-04-15T14:32:42.489000Z 4 mx3.example.org (192.0.2.89) 42.123 ms    [SECURITY SCAN RESULTS - COMPREHENSIVE]  2025-04-15T14:32:42.490000Z SPF: Checking sender policy framework  2025-04-15T14:32:42.491000Z SPF: v=spf1 include:_spf.example.com ~all  2025-04-15T14:32:42.492000Z SPF: PASS (sender@example.com from 192.0.2.17)  2025-04-15T14:32:42.493000Z DKIM: Verifying signature  2025-04-15T14:32:42.494000Z DKIM: v=1; a=rsa-sha256; d=example.com; s=default  2025-04-15T14:32:42.495000Z DKIM: PASS (2048-bit RSA key verified)  2025-04-15T14:32:42.496000Z DMARC: Checking alignment  2025-04-15T14:32:42.497000Z DMARC: v=DMARC1; p=none; rua=mailto:dmarc@example.com  2025-04-15T14:32:42.498000Z DMARC: PASS (policy=none, alignment=strict)  2025-04-15T14:32:42.499000Z SPAM: Analyzing content with SpamAssassin  2025-04-15T14:32:42.500000Z SPAM: Score breakdown: BAYES_00=-1.9, SPF_PASS=-0.1, DKIM_VALID=-0.1  2025-04-15T14:32:42.501000Z SPAM: Final score: -2.1/5.0 (HAM)  2025-04-15T14:32:42.502000Z VIRUS: ClamAV engine initialization  2025-04-15T14:32:42.503000Z VIRUS: Scanning 12568 bytes  2025-04-15T14:32:42.504000Z VIRUS: No threats detected  2025-04-15T14:32:42.505000Z URL-SCAN: Extracting URLs from message body  2025-04-15T14:32:42.506000Z URL-SCAN: No URLs found in message content  2025-04-15T14:32:42.507000Z HEADER-CHECK: Analyzing message headers  2025-04-15T14:32:42.508000Z HEADER-CHECK: No injection attempts detected  2025-04-15T14:32:42.509000Z CONTENT-FILTER: Final verdict: CLEAN (score: -2.1)    [QUEUE MANAGEMENT DETAILS]  2025-04-15T14:32:42.123000Z [SMTP] IN: RCPT TO:<>  2025-04-15T14:32:42.123456Z [SMTP] Looking up recipient in virtual mailbox table  2025-04-15T14:32:42.451892Z [SMTP] Recipient lookup failed: no such user  2025-04-15T14:32:42.452000Z [SMTP] OUT: 550 5.1.1 <>: Recipient address rejected: User unknown in virtual mailbox table  2025-04-15T14:32:42.455000Z [SMTP] IN: RSET  2025-04-15T14:32:42.457000Z [SMTP] OUT: 250 2.0.0 Reset state2025-04-15T14:32:42.510000Z QUEUE: Message 9A3B21C0042 processing status  2025-04-15T14:32:42.511000Z QUEUE: Priority: NORMAL (5)  2025-04-15T14:32:42.512000Z QUEUE: Size: 12568 bytes  2025-04-15T14:32:42.513000Z QUEUE: Age: 0h 0m 3s  2025-04-15T14:32:42.514000Z QUEUE: Attempts: 1/3  2025-04-15T14:32:42.515000Z QUEUE: Next retry: +2h (exponential backoff)  2025-04-15T14:32:42.516000Z QUEUE: Recipient status: FAILED  2025-04-15T14:32:42.517000Z QUEUE: Bounce generated: YES  2025-04-15T14:32:42.518000Z QUEUE: DSN required: YES    [DETAILED SMTP SESSION ANALYSIS]  2025-04-15T14:32:42.519000Z SESSION: Total commands sent: 4  2025-04-15T14:32:42.520000Z SESSION: Total responses received: 6  2025-04-15T14:32:42.521000Z SESSION: Connection time: 0.461 seconds  2025-04-15T14:32:42.522000Z SESSION: Data transferred: 847 bytes  2025-04-15T14:32:42.523000Z SESSION: Encryption used: None (STARTTLS not negotiated)  2025-04-15T14:32:42.524000Z SESSION: Authentication: None required  2025-04-15T14:32:42.525000Z SESSION: Final result: PERMANENT_FAILURE    [RETRY ATTEMPT 2 - 2 HOURS LATER]  2025-04-15T16:44:45.000000Z [RETRY] Initiating retry attempt 2/3  2025-04-15T16:44:45.001000Z [CONN] Opening connection to mx3.example.org:25  2025-04-15T16:44:45.043000Z [CONN] Connection established from 192.0.2.17:58934  2025-04-15T16:44:45.043200Z [SMTP] OUT: 220 mx3.example.org ESMTP Postfix (Ubuntu)  2025-04-15T16:44:45.112000Z [SMTP] IN: EHLO mail-sender.example.com  2025-04-15T16:44:45.115000Z [SMTP] OUT: RCPT TO:<>2025-04-15T16:44:45.115001Z [SMTP] OUT: 250-PIPELINING  2025-04-15T16:44:45.115002Z [SMTP] OUT: 250-SIZE 52428800  2025-04-15T16:44:45.115003Z [SMTP] OUT: 250-VRFY  2025-04-15T16:44:45.115004Z [SMTP] OUT: 250-ETRN  2025-04-15T16:44:45.115005Z [SMTP] OUT: 250-STARTTLS  2025-04-15T16:44:45.115006Z [SMTP] OUT: 250-ENHANCEDSTATUSCODES  2025-04-15T16:44:45.115007Z [SMTP] OUT: 250-8BITMIME  2025-04-15T16:44:45.115008Z [SMTP] OUT: 250 DSN  2025-04-15T16:44:45.117000Z [SMTP] IN: MAIL FROM: SIZE=12568  2025-04-15T16:44:45.120000Z [SMTP] OUT: 250 2.1.0 Ok  2025-04-15T16:44:45.123000Z [SMTP] IN: RCPT TO:  2025-04-15T16:44:45.452000Z [SMTP] OUT: 550 5.1.1 : Recipient address rejected: User unknown in virtual mailbox table  2025-04-15T16:44:45.455000Z [SMTP] IN: RSET  2025-04-15T16:44:45.457000Z [SMTP] OUT: 250 2.0.0 Reset state  2025-04-15T16:44:45.459000Z [SMTP] IN: QUIT  2025-04-15T16:44:45.460000Z [SMTP] OUT: 221 2.0.0 Bye  2025-04-15T16:44:45.461000Z [CONN] Connection closed    [SYSTEM RESOURCE MONITORING - CYCLE 2]  2025-04-15T16:44:45.462000Z CPU: 8.7% user, 2.1% system, 89.2% idle  2025-04-15T16:44:45.463000Z MEM: 3.8GB/16GB (23.75%) BUFFER: 156MB CACHE: 2.3GB  2025-04-15T16:44:45.464000Z SWAP: 0B/4.0GB (0.00%) DISK: 23% used (142.2GB/600GB)  2025-04-15T16:44:45.465000Z LOAD: 0.98 (1min) 1.12 (5min) 1.25 (15min)  2025-04-15T16:44:45.466000Z PROCS: 138 running, 241 sleeping, 8 zombie  2025-04-15T16:44:45.467000Z DISK IO: read 98MB/s, write 28MB/s  2025-04-15T16:44:45.468000Z NET: in 8Mbps, out 5Mbps, errors 0, drops 1  2025-04-15T16:44:45.469000Z MTA QUEUE: 156 messages (52 deferred, 8 active, 96 delivered)    [RETRY ATTEMPT 3 - 4 HOURS LATER]  2025-04-15T18:56:45.000000Z [RETRY] Initiating final retry attempt 3/3  2025-04-15T18:56:45.001000Z [CONN] Opening connection to mx3.example.org:25  2025-04-15T18:56:45.044000Z [CONN] Connection established from 192.0.2.17:62047  2025-04-15T18:56:45.044100Z [SMTP] OUT: 220 mx3.example.org ESMTP Postfix (Ubuntu)  2025-04-15T18:56:45.112000Z [SMTP] IN: EHLO mail-sender.example.com  2025-04-15T14:32:42.123000Z [SMTP] IN: RCPT TO:<>  2025-04-15T14:32:42.123456Z [SMTP] Looking up recipient in virtual mailbox table  2025-04-15T14:32:42.451892Z [SMTP] Recipient lookup failed: no such user  2025-04-15T14:32:42.452000Z [SMTP] OUT: 550 5.1.1 <>: Recipient address rejected: User unknown in virtual mailbox table  2025-04-15T14:32:42.455000Z [SMTP] IN: RSET  2025-04-15T14:32:42.457000Z [SMTP] OUT: 250 2.0.0 Reset state SIZE=12568  2025-04-15T18:56:45.120000Z [SMTP] OUT: 250 2.1.0 Ok  2025-04-15T18:56:45.123000Z [SMTP] IN: RCPT TO:  2025-04-15T18:56:45.452000Z [SMTP] OUT: 550 5.1.1 : Recipient address rejected: RCPT TO:<>User unknown in virtual mailbox table  2025-04-15T18:56:45.455000Z [SMTP] IN: RSET  2025-04-15T18:56:45.457000Z [SMTP] OUT: 250 2.0.0 Reset state  2025-04-15T18:56:45.459000Z [SMTP] IN: QUIT  2025-04-15T18:56:45.460000Z [SMTP] OUT: 221 2.0.0 Bye  2025-04-15T18:56:45.461000Z [CONN] Connection closed    [SYSTEM RESOURCE MONITORING - CYCLE 3]  2025-04-15T18:56:45.462000Z CPU: 15.2% user, 4.8% system, 80.0% idle  2025-04-15T18:56:45.463000Z MEM: 5.1GB/16GB (31.88%) BUFFER: 187MB CACHE: 2.7GB  2025-04-15T18:56:45.464000Z SWAP: 0B/4.0GB (0.00%) DISK: 24% used (144.8GB/600GB)  2025-04-15T18:56:45.465000Z LOAD: 1.87 (1min) 1.52 (5min) 1.39 (15min)  2025-04-15T18:56:45.466000Z PROCS: 162 running, 278 sleeping, 15 zombie  2025-04-15T18:56:45.467000Z DISK IO: read 187MB/s, write 67MB/s  2025-04-15T18:56:45.468000Z NET: in 15Mbps, out 12Mbps, errors 1, drops 3  2025-04-15T18:56:45.469000Z MTA QUEUE: 189 messages (67 deferred, 15 active, 107 delivered)    [FINAL DELIVERY ATTEMPT ANALYSIS]  2025-04-15T20:32:47.000000Z [FINAL] All retry attempts exhausted  2025-04-15T20:32:47.001000Z [FINAL] Generating permanent failure bounce  2025-04-15T20:32:47.002000Z [FINAL] Updating recipient status to FAILED  2025-04-15T20:32:47.003000Z [FINAL] Removing message from active queue  2025-04-15T20:32:47.004000Z [FINAL] Adding to bounce queue for sender notification  2025-04-15T20:32:47.005000Z [FINAL] Message disposition: PERMANENT_FAILURE    [EXTENDED SYSTEM DIAGNOSTICS]  2025-04-15T20:32:47.006000Z SYSINFO: Hostname: RCPT TO:<>2025-04-15T20:32:47.007000Z SYSINFO: Kernel: Linux 5.15.0-72-generic  2025-04-15T20:32:47.008000Z SYSINFO: Architecture: x86_64  2025-04-15T20:32:47.009000Z SYSINFO: Uptime: 47 days, 12:34:56  2025-04-15T20:32:47.010000Z SYSINFO: Users: 12 logged in  2025-04-15T20:32:47.011000Z SYSINFO: Timezone: UTC+0000  2025-04-15T20:32:47.012000Z POSTFIX: Version 3.5.12-1ubuntu1.1  2025-04-15T20:32:47.013000Z POSTFIX: Configuration: /etc/postfix/main.cf  2025-04-15T20:32:47.014000Z POSTFIX: Queue directory: /var/spool/postfix  2025-04-15T20:32:47.015000Z POSTFIX: Active processes: 8  2025-04-15T20:32:47.016000Z POSTFIX: Master PID: 1247  2025-04-15T20:32:47.017000Z POSTFIX: Config hash: a1b2c3d4e5f6g7h8i9j0k1l2m3n4o5p6    [COMPREHENSIVE MAIL LOG ANALYSIS]  2025-04-15T20:32:47.018000Z LOGFILE: RCPT TO:<>: 156MB  2025-04-15T20:32:47.020000Z LOGFILE: /var/log/mail.warn size: 87MB  2025-04-15T20:32:47.021000Z STATISTICS: Messages processed today: 47,832  2025-04-15T20:32:47.022000Z STATISTICS: Successful deliveries: 44,156 (92.31%)  2025-04-15T20:32:47.023000Z STATISTICS: Temporary failures: 2,891 (6.04%)  2025-04-15T20:32:47.024000Z STATISTICS: Permanent failures: 785 (1.64%)  2025-04-15T20:32:47.025000Z STATISTICS: Average delivery time: 2.47 seconds  2025-04-15T20:32:47.026000Z STATISTICS: Peak throughput: 847 msg/hour  2025-04-15T20:32:47.027000Z STATISTICS: Spam blocked: 12,473 messages  2025-04-15T20:32:47.028000Z STATISTICS: Virus blocked: 42 messages    [NETWORK INTERFACE STATISTICS]  2025-04-15T14:32:42.123000Z [SMTP] IN: RCPT TO:<>  2025-04-15T14:32:42.123456Z [SMTP] Looking up recipient in virtual mailbox table  2025-04-15T14:32:42.451892Z [SMTP] Recipient lookup failed: no such user  2025-04-15T14:32:42.452000Z [SMTP] OUT: 550 5.1.1 <>: Recipient address rejected: User unknown in virtual mailbox table  2025-04-15T14:32:42.455000Z [SMTP] IN: RSET  2025-04-15T14:32:42.457000Z [SMTP] OUT: 250 2.0.0 Reset stateeth0: RX bytes:47382947281 (44.1 GiB) TX bytes:28471829384 (26.5 GiB)  2025-04-15T20:32:47.032000Z lo: RX packets:8472841 errors:0 dropped:0 overruns:0 frame:0  2025-04-15T20:32:47.033000Z lo: TX packets:8472841 errors:0 dropped:0 overruns:0 carrier:0  2025-04-15T20:32:47.034000Z lo: RX bytes:2847382947 (2.7 GiB) TX bytes:2847382947 (2.7 GiB)    [STORAGE SUBSYSTEM ANALYSIS]  2025-04-15T20:32:47.035000Z /dev/sda1: 144.8G/600G used (24%) - Mail spool partition  2025-04-15T20:32:47.036000Z /dev/sda2: 8.2G/20G used (41%) - System partition  2025-04-15T20:32:47.037000Z /dev/sda3: 2.1G/100G used (2%) - Log partition  2025-04-15T20:32:47.038000Z I/O stats: 2847382 reads, 1847382 writes, 0 errors  2025-04-15T20:32:47.039000Z Average seek time: 8.2ms  2025-04-15T20:32:47.040000Z Average read speed: 147 MB/s  2025-04-15T20:32:47.041000Z Average write speed: 134 MB/s  [DETAILED SMTP SESSION ANALYSIS]  2025-04-15T14:32:42.123000Z [SMTP] IN: RCPT TO:<>  2025-04-15T14:32:42.123456Z [SMTP] Looking up recipient in virtual mailbox table  2025-04-15T14:32:42.451892Z [SMTP] Recipient lookup failed: no such user  2025-04-15T14:32:42.452000Z [SMTP] OUT: 550 5.1.1 <>: Recipient address rejected: User unknown in virtual mailbox table  2025-04-15T14:32:42.455000Z [SMTP] IN: RSET  2025-04-15T14:32:42.457000Z [SMTP] OUT: 250 2.0.0 Reset state
2025-04-15T14:32:42.519000Z SESSION: Total commands sent: 4  2025-04-15T14:32:42.520000Z SESSION: Total responses received: 6  2025-04-15T14:32:42.521000Z SESSION: Connection time: 0.461 seconds  2025-04-15T14:32:42.522000Z SESSION: Data transferred: 847 bytes  2025-04-15T14:32:42.523000Z SESSION: Encryption used: None (STARTTLS not negotiated)  2025-04-15T14:32:42.524000Z SESSION: Authentication: None required  2025-04-15T14:32:42.525000Z SESSION: Final result: PERMANENT_FAILURE  2025-04-15T14:32:42.115Z [SMTP] OUT: 250 DSN  2025-04-15T14:32:42.117Z [SMTP] IN: MAIL FROM: SIZE=12568  2025-04-15T14:32:42.120Z [SMTP] OUT: 250 2.1.0 Ok  2025-04-15T14:32:42.123Z [SMTP] IN: RCPT TO:<>  2025-04-15T14:32:42.452Z [SMTP] OUT: 550 5.1.1 <>: Recipient address rejected: User unknown in virtual mailbox table  2025-04-15T14:32:42.455Z [SMTP] IN: RSET    **********************************************************************  ** THIS IS AN AUTOMATED MESSAGE. DO NOT REPLY.                     **  ** IF YOU BELIEVE THIS IS AN ERROR, CONTACT YOUR MAIL ADMIN       **  **        https://www.blogger.com/check-activity/
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