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tracig
Level 7
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Message 1 of 11

Emails being rejected by mxlogic.net

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I have multiple emails that my users are reporting are failing, and bounced messages are being returned.

We are using McAfee smart host, so all our emails go out through there.

The errors don't give me an obvious error.. Can anyone tell me what this may be?

Delivery has failed to these recipients or groups:

Sarah User (sarah.user@clientdomain.com)

A problem occurred during the delivery of this message to this e-mail address. Try sending this message again. If the problem continues, please contact your helpdesk.

Derek M. User (derek.user@clientdomain.com)

A problem occurred during the delivery of this message to this e-mail address. Try sending this message again. If the problem continues, please contact your helpdesk.

The following organization rejected your message: p01c11o147.mxlogic.net.

Diagnostic information for administrators:

Generating server: senderserver.senderdomain.com

sarah.user@clientdomain.com

p01c11o147.mxlogic.net #502 Command not implemented ##

derek.user@clientdomain.com

p01c11o147.mxlogic.net #502 Command not implemented ##

Original message headers:

(left headers out)

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kwidhalm
Level 11
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Message 2 of 11

Re: Emails being rejected by mxlogic.net

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Hi tracig,

Please contact your support team and open a service request for this issue so it can be investigated further.

Best regards,

Karen Widhalm

System Support Specialist

SaaS Email and Web Security

McAfee. Part of Intel Security.

10 Replies
kwidhalm
Level 11
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Message 2 of 11

Re: Emails being rejected by mxlogic.net

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Hi tracig,

Please contact your support team and open a service request for this issue so it can be investigated further.

Best regards,

Karen Widhalm

System Support Specialist

SaaS Email and Web Security

McAfee. Part of Intel Security.

frankm
Level 10
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Message 3 of 11

Re: Emails being rejected by mxlogic.net

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More often than not, you will find this is an issue with the recipients server rejecting the SMTP connection, e.g. Firewall issue.

Re: Emails being rejected by mxlogic.net

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we have the same problem that started yesterday.. The rejected emails from MXLOGIC is completely random.. I have a ticket open with them, and apparently there's a parent ticket which they are looking into affecting multiple customers

frankm
Level 10
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Message 5 of 11

Re: Emails being rejected by mxlogic.net

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But is it really McAfee rejecting the email? This is not an error that is generated by McAfee.

Re: Emails being rejected by mxlogic.net

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yes.. the bounceback error is saying that mxlogic server is rejecting the message.  At least for us that's the message that we've been getting.   I've been told by the mxlogic support team this morning that its the only major ticket that has been escalated and is being worked on currently.

frankm
Level 10
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Message 7 of 11

Re: Emails being rejected by mxlogic.net

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The NDR says the sender's server is generating the NDR, for which McAfee is relaying back. That's how I see it.

cascadia
Level 12
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Message 8 of 11

Re: Emails being rejected by mxlogic.net

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The 502 Command Not Implemented error was technically issued by the SaaS Email Protection service, however it was caused by the sending server. The 502 error is issued rarely, only when a sending server continues to feed data to a McAfee MTA after a tempfail or other bounce has been issued, or when a sending server attempts to issue a command that is non-standard (such as VRFY). In many cases we saw yesterday, our system issued a temp-fail for a message suspected to be spam, which was ignored by the sending server which continued to send data. The SaaS System responded to that continued data with a command not implemented error since the information it was receiving was not a command response, but more data, which the service could no longer interpret since the data phase of the transaction was closed.

Most instances over the last few days were caused by systems that had been unknowngly infected with malware that generated fax-spam.

Bradly McGarr, Security+, MCP, MTA-Windows OS, CIW-WFA, A+

Intel Security

McAfee SaaS Email & Web Security Technical Support Technician

frankm
Level 10
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Message 9 of 11

Re: Emails being rejected by mxlogic.net

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The only reference I find so far in the McAfee KB, relates to outbound servers, TLS and Cisco PIX or ASA Firewall. If this is an additional reaction with McAfee's MTA, this would be a good additional KB item to add.

cascadia
Level 12
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Message 10 of 11

Re: Emails being rejected by mxlogic.net

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It's not likely to be added any time soon to the KB since it was a "perfect storm" of factors that are exceptionally unlikely to occur under normal circumstances.