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[8.201] RDNS missing

Tribmos
I saw the other thread but it is locked currently.

I have been noticing a large increase of 'RDNS missing' entries in the Mail Log.

Typically a user sends me a message that they have not been getting mail (often the client sends it from a gmail or such to inform them).  Verify the log and see the RDNS entries.  Pop over to MXToolbox and run their checks and see it labeled as OK on the RDNS check.

So I am at a loss as to why it is occurring.

For example: seagullscientific.invisionzone.com - this is a support forum for label software, it got a RDNS missing despite it appears to be all correct (unless i'm missing something).  Astaro logged it as coming from 208.67.212.34


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  • 0
    Hence, a DNS issue... the MX record should be fixed.

    Maybe I don't understand it correctly, but, for me, an MX record is the FQDN of an MTA that can receive email for a domain - it's not necessarily an MTA that sends email.

    When you say DKIM is broken, what are you seeing?  I set ours up two years ago, and 8.202 seems to handle sent/received items correctly less than two days into V8.  My test just now was sending/receiving between my Yahoo account and my MediaSoft account behind the Astaro.

    Cheers - Bob
     
    Sophos UTM Community Moderator
    Sophos Certified Architect - UTM
    Sophos Certified Engineer - XG
    Gold Solution Partner since 2005
    MediaSoft, Inc. USA
  • 0 in reply to BAlfson
    Bob... try sending a DKIM signed mail from the Astaro to check-auth@verifier.port25.com   --- and see if you get a fail entry for DKIM.  My setup worked fine under 8.103, but now fails under 8.102 (no config changes made) ... Astaro Support is currently investigating it.  I even tried rekeying it per Astaro Support's request, it made no change.

    CTO, Convergent Information Security Solutions, LLC

    https://www.convergesecurity.com

    Advice given as posted on this forum does not construe a support relationship or other relationship with Convergent Information Security Solutions, LLC or its subsidiaries.  Use the advice given at your own risk.

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  • 0 in reply to BAlfson
    Bob... try sending a DKIM signed mail from the Astaro to check-auth@verifier.port25.com   --- and see if you get a fail entry for DKIM.  My setup worked fine under 8.103, but now fails under 8.102 (no config changes made) ... Astaro Support is currently investigating it.  I even tried rekeying it per Astaro Support's request, it made no change.

    CTO, Convergent Information Security Solutions, LLC

    https://www.convergesecurity.com

    Advice given as posted on this forum does not construe a support relationship or other relationship with Convergent Information Security Solutions, LLC or its subsidiaries.  Use the advice given at your own risk.

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