[bitfolk] BitFolk's DNS resolvers are currently blocked from…

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Author: Andy Smith
Date:  
To: announce
Subject: [bitfolk] BitFolk's DNS resolvers are currently blocked from querying URIBL

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gpg: Signature made Sun Feb 2 12:31:50 2020 UTC
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gpg: Good signature from "Andy Smith <andy@strugglers.net>" [unknown]
gpg: aka "Andrew James Smith <andy@strugglers.net>" [unknown]
gpg: aka "Andy Smith (UKUUG) <andy.smith@ukuug.org>" [unknown]
gpg: aka "Andy Smith (BitFolk Ltd.) <andy@bitfolk.com>" [unknown]
gpg: aka "Andy Smith (Linux User Groups UK) <andy@lug.org.uk>" [unknown]
gpg: aka "Andy Smith (Cernio Technology Cooperative) <andy.smith@cernio.com>" [unknown]
Hi,

I noticed that as of at least yesterday, BitFolk's DNS resolvers are
blocked from querying URIBL¹.

URIBL is a DNS-based blocklist of URIs mentioned in email spam. It
is used by default in SpamAssassin and other anti-spam products.

The usual reason for being blocked from querying URIBL is excessive
query volume. Their web site mentions a figure of 100k queries per
day.

I've had a look at the usage from BitFOlk's SpamAssassin service²
and the cluster is only checking about 7k emails per day. Possibly
7k emails expands to over 100k URIs to query, or possibly other
customers are doing excessive DNS queries - anyone using BitFolk's
resolvers to query will add to the count. I have asked URIBL for
clarification of what the issue is.

If the issue is query load then we will pay for a feed.

Until that is sorted out you will unfortunately be unable to query
URIBL usefully. It returns a value that SpamAssassin recognises as
"query blocked".

Cheers,
Andy

¹ https://uribl.com/

² https://www.bitfolk.com/customer_information.html#toc_2_SpamAssassin

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