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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
    having upgraded our UTM to version 9.100-16 we're now experiencing email issues.
    we're getting failed nslookup from the UTM console but everywhere else is completely fine.

    to get the emails working again i've had to disable the following:

    AntiSpam - reject invalid HELO / missing RDNS now mail is flowing again.

    this is only happened since the upgrade
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  • 0
    having upgraded our UTM to version 9.100-16 we're now experiencing email issues.
    we're getting failed nslookup from the UTM console but everywhere else is completely fine.

    to get the emails working again i've had to disable the following:

    AntiSpam - reject invalid HELO / missing RDNS now mail is flowing again.

    this is only happened since the upgrade
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