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failed to expand ACL string

derlekker
My SMTP-Proxy (Sophos UTM 9.004-34) logs sometimes the following log:

2013-01-10 11:37:15 H=(mx.proventhotels.com) [87.193.188.120]:35564 temporarily rejected MAIL : failed to expand ACL string "${lookup dnsdb {>\n; txt= $sender_address_domain}}": lookup of "ptr=87.193.188.120">

I have check the RNDS-Entry; everything is ok; DNS and ptr of the host;
but my astaro this message! I don't unterstand why?

I can diable "do strict RDNS checks" but is this the solution?

Can i clear a spezial database with the ptr entries?
Is this a bug? 

Have anyone a idea?

Thanks


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  • 0
    Hi BAlfson,

    i have one question more:

    i check the rdns entry on the heise.de site for this domain:

    PTR 

    name:
        148.128.18.184.212.in-addr.arpa

    ptrdname:
        smtp2.kdvz.net 

    why the ip adress have 5 bytes 212.184.18.128.148?

    thx
Reply
  • 0
    Hi BAlfson,

    i have one question more:

    i check the rdns entry on the heise.de site for this domain:

    PTR 

    name:
        148.128.18.184.212.in-addr.arpa

    ptrdname:
        smtp2.kdvz.net 

    why the ip adress have 5 bytes 212.184.18.128.148?

    thx
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