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RBL working too well

mkleine

Greetings, 

Yesterday morning I upgraded to firmware version 9.705-7. This morning at about 6:00 am the RBL feature has started rejecting well-known hosts. Shown here are oktax.state.ok and pharmacy.cvs.com. 

Checking pharmacy.cvs.com with www.anti-abuse.org I see that it's all green.

I have turned off the RBL checks in the SMTP Antispam page and those email addresses are now going through the mail server.
However, so are any 'bad-guy' sites that actually test as RBL failures. So, this is a workaround, not a fix.

Thoughts?



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  • 0

    I see the pharmacy.cvs IP on the SORBS SPAM blacklist using mxtoolbox.com, but the OK State Tax Commission's IP is not listed anywhere. The cbl.abuseat.org RBL is one that you get when you select 'Use recommended RBLs'.  I would uncheck that for the time being and add zen.spamhaus.org to 'Extra RBL Zones'.

    To see all of the RBL-rejected addresses, run the following command:

         zgrep 'reason="rbl"' /var/log/smtp/2021/05/*26*|grep -oP 'from=".*?"'|sort -n|uniq -c

    That will let you know if any other desired domain is on an RBL.

    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

    Thank you for that Bob, for so long it gets tiring helping vendors diagnose their crap and you, me, the rest of us don't get paid to fix their stuff or tell them they're broken. haha  First time 3 people get legit stuff blocked, I get in the UTM, disable recommended, and click apply, THEN GO research it. Since 1999 you're right on as far as I can remember.  signed, another old but extremely long term memory dude over here in Tulsa. 

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  • 0 in reply to BAlfson

    Thank you for that Bob, for so long it gets tiring helping vendors diagnose their crap and you, me, the rest of us don't get paid to fix their stuff or tell them they're broken. haha  First time 3 people get legit stuff blocked, I get in the UTM, disable recommended, and click apply, THEN GO research it. Since 1999 you're right on as far as I can remember.  signed, another old but extremely long term memory dude over here in Tulsa. 

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  • 0 in reply to RDL

    also, I've installed 9.706-9 on several test boxes, home accounts on friends homes and no complaints yet so it looks like this long awaited firmware is happy, no spam filtering issues, even one client with 90 plus employees on it with a 210 and no web filtering issues.  Thank you sir for all you do and helping others.  

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