Here is what I think is happening...
Typically, DNS responses are received via UDP are limited to 512 bytes. There is an extension to DNS that can be used to switch to using TCP when this happens. Unfortunately MDaemon does not support making this switch yet. As a work around you should be able to configure your firewalls, routers, or anything else that might be limiting UDP packet sizes and it should work. I checked with our network administration and he has allowed larger udp packets on our network, which is why it worked here.
Updating MDaemon to switch to TCP in these cases is on our wish list.
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Arron Caruth
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-----Original Message-----
From: discuss@mdaemon.com [mailto:discuss@mdaemon.com] On Behalf Of Rob Deal (rob@orion.com.au)
Sent: Thursday, March 21, 2019 12:51 AM
To: discuss List Member <discuss@mdaemon.com>
Subject: [discuss] dmarc rejected email problem
We have seen that same issues here with officeworks.com.au with a client's MDaemon.
Our MDaemon doesn’t have the issue, we have tried both internal windows DNS and external DNS servers which produce the same error.
Wed 2019-03-20 16:13:14.677: Session 821498; child 0003 Wed 2019-03-20 16:13:14.677: Accepting SMTP connection from 13.55.52.35:52684 to 10.0.0.1:25 Wed 2019-03-20 16:13:14.695: --> 220 mail.wastech.com.au ESMTP MDaemon 18.5.3; Wed, 20 Mar 2019 16:13:14 +1100 Wed 2019-03-20 16:13:14.709: <-- EHLO mg-aaus-iota.mailguard.com.au Wed 2019-03-20 16:13:14.710: Performing IP lookup (mg-aaus-iota.mailguard.com.au) Wed 2019-03-20 16:13:14.715: * D=mg-aaus-iota.mailguard.com.au TTL=(43) A=[13.55.52.35] Wed 2019-03-20 16:13:14.715: ---- End IP lookup results Wed 2019-03-20 16:13:14.716: EHLO/HELO response delayed 5 seconds Wed 2019-03-20 16:13:19.717: --> 250-mail.wastech.com.au Hello mg-aaus-iota.mailguard.com.au [13.55.52.35], pleased to meet you Wed 2019-03-20 16:13:19.717: --> 250-ETRN Wed 2019-03-20 16:13:19.717: --> 250-AUTH LOGIN PLAIN Wed 2019-03-20 16:13:19.717: --> 250-8BITMIME Wed 2019-03-20 16:13:19.717: --> 250-ENHANCEDSTATUSCODES Wed 2019-03-20 16:13:19.717: --> 250-STARTTLS Wed 2019-03-20 16:13:19.717: --> 250 SIZE Wed 2019-03-20 16:13:19.731: <-- STARTTLS Wed 2019-03-20 16:13:19.732: --> 220 2.7.0 Ready to start TLS Wed 2019-03-20 16:13:20.773: SSL negotiation successful (TLS 1.2, 256 bit key exchange, 256 bit AES encryption) Wed 2019-03-20 16:13:20.793: <-- EHLO mg-aaus-iota.mailguard.com.au Wed 2019-03-20 16:13:20.793: Performing IP lookup (mg-aaus-iota.mailguard.com.au) Wed 2019-03-20 16:13:20.798: * D=mg-aaus-iota.mailguard.com.au TTL=(43) A=[13.55.52.35] Wed 2019-03-20 16:13:20.798: ---- End IP lookup results Wed 2019-03-20 16:13:20.798: --> 250-mail.wastech.com.au Hello mg-aaus-iota.mailguard.com.au [13.55.52.35], pleased to meet you Wed 2019-03-20 16:13:20.798: --> 250-ETRN Wed 2019-03-20 16:13:20.798: --> 250-AUTH LOGIN PLAIN Wed 2019-03-20 16:13:20.798: --> 250-8BITMIME Wed 2019-03-20 16:13:20.798: --> 250-ENHANCEDSTATUSCODES Wed 2019-03-20 16:13:20.798: --> 250 SIZE Wed 2019-03-20 16:13:20.812: <-- MAIL FROM:<officeworksaccountsp@officeworks.com.au> SIZE=18658 Wed 2019-03-20 16:13:20.812: Performing PTR lookup (35.52.55.13.IN-ADDR.ARPA) Wed 2019-03-20 16:13:20.841: * D=35.52.55.13.IN-ADDR.ARPA TTL=(5) PTR=[mg-aaus-iota.mailguard.com.au]
Wed 2019-03-20 16:13:20.846: * D=mg-aaus-iota.mailguard.com.au TTL=(43) A=[13.55.52.35] Wed 2019-03-20 16:13:20.846: ---- End PTR results Wed 2019-03-20 16:13:20.846: Performing IP lookup (officeworks.com.au) Wed 2019-03-20 16:13:20.851: * D=officeworks.com.au TTL=(0) A=[3.104.26.194] Wed 2019-03-20 16:13:20.851: * D=officeworks.com.au TTL=(0) A=[13.211.65.153] Wed 2019-03-20 16:13:20.855: * P=010 S=000 D=officeworks.com.au TTL=(19) MX=[filter1.office-4.mailguard.com.au]
Wed 2019-03-20 16:13:20.855: * P=020 S=001 D=officeworks.com.au TTL=(19) MX=[filter2.office-4.mailguard.com.au]
Wed 2019-03-20 16:13:20.855: * P=030 S=002 D=officeworks.com.au TTL=(19) MX=[filter3.office-4.mailguard.com.au]
Wed 2019-03-20 16:13:21.224: * D=filter1.office-4.mailguard.com.au TTL=(0) A=[13.55.209.247] Wed 2019-03-20 16:13:21.224: * D=filter1.office-4.mailguard.com.au TTL=(0) A=[13.210.103.163] Wed 2019-03-20 16:13:21.224: * D=filter1.office-4.mailguard.com.au TTL=(0) A=[13.210.175.152] Wed 2019-03-20 16:13:21.224: * D=filter1.office-4.mailguard.com.au TTL=(0) A=[13.210.188.175] Wed 2019-03-20 16:13:21.224: * D=filter1.office-4.mailguard.com.au TTL=(0) A=[34.193.97.194] Wed 2019-03-20 16:13:21.224: * D=filter1.office-4.mailguard.com.au TTL=(0) A=[34.210.162.117] Wed 2019-03-20 16:13:21.224: * D=filter1.office-4.mailguard.com.au TTL=(0) A=[34.215.223.119] Wed 2019-03-20 16:13:21.224: * D=filter1.office-4.mailguard.com.au TTL=(0) A=[34.237.181.146] Wed 2019-03-20 16:13:21.224: * D=filter1.office-4.mailguard.com.au TTL=(0) A=[54.79.41.83] Wed 2019-03-20 16:13:21.224: * D=filter1.office-4.mailguard.com.au TTL=(0) A=[13.54.220.210] Wed 2019-03-20 16:13:21.594: * D=filter2.office-4.mailguard.com.au TTL=(0) A=[34.210.162.117] Wed 2019-03-20 16:13:21.594: * D=filter2.office-4.mailguard.com.au TTL=(0) A=[34.215.136.158] Wed 2019-03-20 16:13:21.594: * D=filter2.office-4.mailguard.com.au TTL=(0) A=[34.215.211.69] Wed 2019-03-20 16:13:21.594: * D=filter2.office-4.mailguard.com.au TTL=(0) A=[34.215.223.119] Wed 2019-03-20 16:13:21.594: * D=filter2.office-4.mailguard.com.au TTL=(0) A=[34.237.162.207] Wed 2019-03-20 16:13:21.594: * D=filter2.office-4.mailguard.com.au TTL=(0) A=[34.237.180.102] Wed 2019-03-20 16:13:21.594: * D=filter2.office-4.mailguard.com.au TTL=(0) A=[34.237.181.146] Wed 2019-03-20 16:13:21.594: * D=filter2.office-4.mailguard.com.au TTL=(0) A=[54.79.41.83] Wed 2019-03-20 16:13:21.594: * D=filter2.office-4.mailguard.com.au TTL=(0) A=[13.54.220.210] Wed 2019-03-20 16:13:21.594: * D=filter2.office-4.mailguard.com.au TTL=(0) A=[13.55.52.35] Wed 2019-03-20 16:13:21.594: * D=filter2.office-4.mailguard.com.au TTL=(0) A=[13.55.209.247] Wed 2019-03-20 16:13:21.594: * D=filter2.office-4.mailguard.com.au TTL=(0) A=[13.210.103.163] Wed 2019-03-20 16:13:21.594: * D=filter2.office-4.mailguard.com.au TTL=(0) A=[13.210.137.250] Wed 2019-03-20 16:13:21.594: * D=filter2.office-4.mailguard.com.au TTL=(0) A=[13.210.145.47] Wed 2019-03-20 16:13:21.594: * D=filter2.office-4.mailguard.com.au TTL=(0) A=[13.210.160.215] Wed 2019-03-20 16:13:21.594: * D=filter2.office-4.mailguard.com.au TTL=(0) A=[13.210.175.152] Wed 2019-03-20 16:13:21.594: * D=filter2.office-4.mailguard.com.au TTL=(0) A=[13.210.188.175] Wed 2019-03-20 16:13:21.594: * D=filter2.office-4.mailguard.com.au TTL=(0) A=[34.202.243.228] Wed 2019-03-20 16:13:21.594: * D=filter2.office-4.mailguard.com.au TTL=(0) A=[34.208.153.28] Wed 2019-03-20 16:13:21.595: ---- End IP lookup results Wed 2019-03-20 16:13:21.595: Performing SPF lookup (mg-aaus-iota.mailguard.com.au / 13.55.52.35) Wed 2019-03-20 16:13:22.170: * Result: none; no SPF record in DNS Wed 2019-03-20 16:13:22.170: ---- End SPF results Wed 2019-03-20 16:13:22.170: Performing SPF lookup (officeworks.com.au / 13.55.52.35) Wed 2019-03-20 16:13:22.305: * Result: none; no SPF record in DNS Wed 2019-03-20 16:13:22.305: ---- End SPF results Wed 2019-03-20 16:13:22.305: --> 250 2.1.0 Sender OK Wed 2019-03-20 16:13:22.320: <-- RCPT TO:<accounts@wastech.com.au> Wed 2019-03-20 16:13:22.339: Performing DNS-BL lookup (13.55.52.35 - connecting IP) Wed 2019-03-20 16:13:22.828: * bl.spamcop.net - passed Wed 2019-03-20 16:13:22.859: * zen.spamhaus.org - passed Wed 2019-03-20 16:13:22.860: ---- End DNS-BL results Wed 2019-03-20 16:13:22.860: --> 250 2.1.5 Recipient OK Wed 2019-03-20 16:13:22.874: <-- DATA Wed 2019-03-20 16:13:22.876: Creating temp file (SMTP): d:\mdaemon\temp\65\md50000000100.tmp
Wed 2019-03-20 16:13:22.876: --> 354 Enter mail, end with <CRLF>.<CRLF> Wed 2019-03-20 16:13:22.913: Message size: 18658 bytes Wed 2019-03-20 16:13:22.914: Performing DKIM lookup Wed 2019-03-20 16:13:22.914: * File: d:\mdaemon\temp\65\md50000000100.tmp
Wed 2019-03-20 16:13:22.914: * Message-ID: <ADR44000001307440011B2B5AB935E031ED992D9DB76EDC942DC@officeworks.com.au>
Wed 2019-03-20 16:13:22.934: * DKIM-Signature 1: v=1; a=rsa-sha256; d=officeworks.com.au; s=mail1; c=relaxed/relaxed; t=1553058792; <some tags are not logged>
Wed 2019-03-20 16:13:22.934: * Verification result: DKIM_BODY_HASH_MISMATCH
Wed 2019-03-20 16:13:22.934: * Result: neutral Wed 2019-03-20 16:13:22.934: ---- End DKIM results Wed 2019-03-20 16:13:22.940: Performing DMARC processing Wed 2019-03-20 16:13:22.940: * File: d:\mdaemon\temp\65\md50000000100.tmp
Wed 2019-03-20 16:13:22.940: * Message-ID: <ADR44000001307440011B2B5AB935E031ED992D9DB76EDC942DC@officeworks.com.au>
Wed 2019-03-20 16:13:22.940: * Author domain: officeworks.com.au Wed 2019-03-20 16:13:22.940: * Organizational domain: officeworks.com.au Wed 2019-03-20 16:13:22.940: * Query domain: _dmarc.officeworks.com.au
Wed 2019-03-20 16:13:22.947: * Policy record: v=DMARC1; p=reject; pct=100; rua=mailto:jpzsm3la@ag.dmarcian-ap.com; ruf=mailto:jpzsm3la@fr.dmarcian-ap.com;
Wed 2019-03-20 16:13:22.952: * Verifying report recipient: jpzsm3la@ag.dmarcian-ap.com Wed 2019-03-20 16:13:22.953: * Query domain: officeworks.com.au._report._dmarc.ag.dmarcian-ap.com
Wed 2019-03-20 16:13:23.551: * Policy record: v=DMARC1;
Wed 2019-03-20 16:13:23.551: * Recipient jpzsm3la@ag.dmarcian-ap.com is verified
Wed 2019-03-20 16:13:23.556: * Verifying report recipient: jpzsm3la@fr.dmarcian-ap.com Wed 2019-03-20 16:13:23.556: * Query domain: officeworks.com.au._report._dmarc.fr.dmarcian-ap.com
Wed 2019-03-20 16:13:23.929: * Policy record: v=DMARC1;
Wed 2019-03-20 16:13:23.929: * Recipient jpzsm3la@fr.dmarcian-ap.com is verified
Wed 2019-03-20 16:13:23.929: * Checking authentication mechanisms for DMARC alignment
Wed 2019-03-20 16:13:23.929: * SPF: no SPF policy found
Wed 2019-03-20 16:13:23.930: * DKIM: domain "officeworks.com.au" (from d= of signature #1) failed verification
Wed 2019-03-20 16:13:23.930: * Action taken: reject Wed 2019-03-20 16:13:23.930: * Result: fail Wed 2019-03-20 16:13:23.930: ---- End DMARC results Wed 2019-03-20 16:13:23.932: --> 550 5.7.0 Message rejected per DMARC policy for officeworks.com.au Wed 2019-03-20 16:13:23.935: SMTP session terminated (Bytes in/out: 20054/4617) Wed 2019-03-20 16:13:23.935: ----------
Regards,
Rob Deal
Technical Director
Orion Computers Pty Ltd
Ph: 03 9645 2224
Fax: 03 9645-1112
Mob: 0417 316 117
This email is powered by the MDaemon Messaging Server
-----Original Message-----
From: discuss@mdaemon.com <discuss@mdaemon.com> On Behalf Of Dave Warren
Sent: Thursday, 21 March 2019 12:31 PM
To: discuss List Member <discuss@mdaemon.com>
Subject: [discuss] dmarc rejected email problem
I suspect the problem is due to the fact that the SPF record is invalid.
https://tools.wordtothewise.com/spf/check/wildix.com can help you understand and adjust your record.
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