Thank you so much. reference. Microsoft Defender for Office 365 plan 1 and plan 2. . Checked and I don't see it as being blacklisted. Review the Composite Authentication charts below for more information about the results. Anti-phishing policies look for lookalike domains and senders, whereas anti-spoofing is more concerned with domain authentication (SPF, DMARC, and DKIM). The error message is 'compauth=fail reason=601'. Spam filtering marked the message as non-spam and the message was sent to the intended recipients. Do you have any suggestions to mark these emails as spam/phishing/spoofed email and either block them or mark them as junk/send to quarantine? FYI, you should be looking at the SMTP protocol logs, not the message tracking logs. Authentication-Results: spf=pass (sender IP is 13.111.207.78) smtp.mailfrom=bounce.relay.corestream.com; mcneese.edu; dkim=none (message not signed) header.d=none;mcneese.edu; dmarc=none action=none header.from=mcneese.edu;compauth=fail reason=601 Adding a . I mean that 601 isn't a status code that I've seen defined in any RFC for the SMTP protocol -- at least not any RFC that Exchange claims it follows. We use 'campaign monitor' to send out email newsletters, and it works very well, except any emails which come to our domain are marked by o365 as Junk. I read that & Compliance > Threat Management > Policy > Anti-spam > Spoof intelligence That means the feature is in production. In order to keep pace with new hires, the IT manager is currently stuck doing the following: 2021-05-22 20:01. I understand that this is because they are pretending to be ourdomain.com but not originating from o365 so appear to be spoof. But if that's the case then what's up with the SPF failure? MS puts useful information in the header that will give you a clue regarding the reason it was put in junk. to whatever software they're using. DKIM failure when signing with different domain - header.d ignored. Whitelisting the messages as sent from your domain and from the allowed IPs, that would be a pretty solid rule. For more information about how admins can manage a user's Blocked Senders list, see Configure junk email settings on Exchange Online mailboxes. Seriously!?!? Possible values include: 9.19: Domain impersonation. X-Microsoft-Antispam: Contains additional information about bulk mail and phishing. For example, the message received a DMARC fail with an action of quarantine or reject. Configure dmarc and make sure the dkim aligns at least (if the return path can't match the from). The message was marked as spam by spam filtering. Indicates the action taken by the spam filter based on the results of the DMARC check. The value is a 3-digit code. Can you post the relevant headers including the authentication headers ? 601 is a generic error message. DKIM. . We (sender.org) provide a mail server for a client (example.org) and sign outgoing messages with our . log files they produce, too. reason 001: The message failed implicit authentication (compauth=fail). Press question mark to learn the rest of the keyboard shortcuts. I ran a message header analyzer and found this. Do you have any suggestions to mark these emails as spam/phishing/spoofed email and either block them or mark them as junk/send to quarantine? I can crank up a setting to send SPF fails into the fire in O365 > Security ; email; microsoft-office-365; exchangeonline; spam-marked; email : EFilteredAsspam. Used by Microsoft 365 to combine multiple types of authentication such as SPF, DKIM, DMARC, or any other part of the message to determine whether or not the message is authenticated. I finally might have the budget for next year to refresh my servers.I'm undecided if I should stick with the traditional HPE 2062 MSA array (Dual Controller) with 15k SAS drives or move to a Nimble HF appliance. Check if compauth.fail.reason.001 is legit website or scam website URL checker is a free tool to detect malicious URLs including malware, scam and phishing links. Case 1: If you don't set up DKIM Signature, ESPs such as GSuite & Office365 sign all your outgoing emails with their default DKIM Signature Key. Please Note: Since the web site is not hosted by Microsoft, the link may change without notice. A very common case in which your DMARC may be failing is that you haven't specified a DKIM signature for your domain. We've been receiving emails lately where the sender is spoofing some of our accounts and in the header it's stating "Does not desiginate permitted sender host" (which is true) and the Authentication Results 5 The reason for the DMARC fail on SPF policy ( <policy_evaluated><spf>fail) despite the SPF check passing ( <auth_results><spf><result>pass) is that your SMTP "mailFrom" ( envelope MAIL From or RFC 5321.MailFrom) & your header "From" fields are out of alignment. Learn about who can sign up and trial terms here. are failing with a "compauth=fail reason=601". The message was released from the quarantine and was sent to the intended recipients. OR If you have feedback for TechNet Subscriber Support, contact For more information, see. - Firstly go to MXtoolbox.com and check that your IP is not blacklisted. The message was identified as phishing and will also be marked with one of the following values: Filtering was skipped and the message was blocked because it was sent from an address in a user's Blocked Senders list. For more information, see. Does anyone know if there are any free training anywhere ? I've done that already (see headers in other reply) and it's still happening. For information about how to view an email message header in various email clients, see View internet message headers in Outlook. I'm sorry, I don't know what you mean by this. The error message is 'compauth=fail reason=601'. Test drive when just shopping and comparing? the alignment is probably wrong . Do not add to the domain safelist in the anti-spam policy however, thats a bad idea. For example: 000: The message failed explicit authentication (compauth=fail). Is there a rule I can set to allow these through safely? It has been a while, and I hope that they wised up by now.Gregg. The message skipped spam filtering because the source IP address was in the IP Allow List. I left google now its going away here to!? We use MailChimp to send out campaign emails to thousands of people, a lot of which are part of our internal organization. The following table describes useful fields in the X-Microsoft-Antispam message header. The message was identified as bulk email by spam filtering and the bulk complaint level (BCL) threshold. You'll notice that the roadmap item was just added in the last 24 hours, and was immediately listed as "rolling out". Agree with the information provided by Andy above, trychanging your anti-spoofing settings in thePolicy ofThreat management. If your server rejects a message it won't show up in the message tracking logs. Did you know you can try the features in Microsoft 365 Defender for Office 365 Plan 2 for free? The spam confidence level (SCL) of the message. This means that the sending domain did not have email authentication records published, or if they did, they had a weaker failure policy (SPF soft fail or neutral, DMARC policy of p=none). This article describes what's available in these header fields. For example, the message was marked as SCL 5 to 9 by a mail flow rule. As said before, to classify whether a coming email is a spam, which needs to check the "compauth failure" values (not only the . What You Need To Know About DKIM Fail. The error message is 'compauth=fail reason=601'. compauth=fail reason=601 Received-SPF: None (protection.outlook.com: eu-smtp-1.mimecast.com does not designate permitted sender hosts) The message skipped spam filtering and was delivered to the Inbox because the sender was in the allowed senders list or allowed domains list in an anti-spam policy. In all Microsoft 365 organizations, EOP uses these standards to verify inbound email: SPF. I can't be sure from the extract you posted, but it's the likely answer. Do suggestions above help? Similar to SFV:SKN, the message skipped spam filtering for another reason (for example, an intra-organizational email within a tenant). Here is the contents of the email the client gets: Use "get-receiveconnector" for a list of all the connector names. I just looked through my Exchange message logs and it looks like it is hitting our server but I guess it is getting turned around? Fields that aren't described in the table are used exclusively by the Microsoft anti-spam team for diagnostic purposes. The reason the composite authentication passed or failed. you having this problem all the time or just with this client? The receiving MTA fails to align the two domains, and hence . Repeat the steps above for other campaigns as needed. You can copy and paste the contents of a message header into the Message Header Analyzer tool. You can follow the question or vote as helpful, but you cannot reply to this thread. -Any Test marketing emails going to junk with 'compauth=fail reason=601' We use 'campaign monitor' to send out email newsletters, and it works very well, except any emails which come to our domain are marked by o365 as Junk. To continue this discussion, please ask a new question. However, when a test email was sent, it still reports compauth=fail reason=601 and gets quarantined by our anti-phishing policy as a spoof email. And if the CompAuth result is fail, these are the reasons why it could fail: 000 means the message failed DMARC with an action of reject or quarantine. I have set up SPF and DKIM, but the issue still arises. If I start to see legitimate emails being caught by Anti Spam (I have one last night from our helpdesk) do I create a transport rule to allow the email or just whitelist? and it came up with a few issues: - Secondly, can you telnet on port 25 from your exchange server? FYI, you should be looking at the SMTP protocol logs, not the message tracking logs. We use 'campaign monitor' to send out email newsletters, and it works very well, except any emails which come to our domain are marked by o365 as Junk. What actions are set for your anti-phishing polices? I used this command to turn it on: Delivery Failure Reason: 601 Attempted to send the message to the following ip's: Exchange 2003 and Exchange 2007 - General Discussion. Microsoft 365 Defender. I read that I can crank up a setting to send SPF fails into the fire in O365 > Security & Compliance > Threat Management > Policy > Anti-spam > Spoof intelligence policy but that's greyed out. John changed his password and seems to have stopped worrying about it, but I don't think he's taking it anywhere near seriously enough.

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