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On Thursday, 29 April 2021 18:27 -0000,
in article <
anfi+5vocj9q4pf-l4t4@wp.eu>,
Andrzej Adam Filip <
anfi@onet.eu> wrote:
David Ritz <dritz@mindspring.com> wrote:
On Sunday, 25 April 2021 17:01 -0000,
in article <anfi+8lvbnhhn0f-l4p0@wp.eu>,
Andrzej Adam Filip <anfi@onet.eu> wrote:
I personally use
bogofilter first and spamassassin in network mode for "more likely spam".
I want to avoid DNS-BL and bulk detector queries for "more likely
ham". I treat them as privacy threat.
How does a reputation check, through a second party service, affect
privacy? Do any and all DNS query do the same? What about WHOIS?
I consider sending DNS(BL) queries about every email/ham received
needless exposure of email/ham source and fetch time.
As most ham comes from known and/or trusted sources, I whitelist prior
to feeding my mail through SpamAssassin. This precludes the need the
need for network checks, ie. DNSBL, URIBL or HashBL. As such, there
is only a small chance expected and legitimate mail will be subjected
to such checks, exposing exactly nothing.
1. Are there any tools operating in such mode?
2. How to make spamassassin operate in similar mode?
SpamAssassin is designed specifically to benefit from DNSbl and
URIbl checks.
Spamassassin can be use in "local test only" mode (--local).
Yes, it can be. I, for one, find network checks invaluable, for my
personal mail stream.
Subject: [spam: 139.6] Payment of US$5,550,000.00 to your account
Subject: [spam: 105.5] Urgent
Subject: [spam: 100.3] LUCKY WINNER
Subject: [spam: 108.0] I AM SORRY TO ENCROACH IN TO YOUR PRIVACY!!
Subject: [spam: 103.9] Get back to me !!!
Subject: [spam: 124.2] PRIVATE AND CONFIDENTIAL
Subject: [spam: 101.2] Investment Of Bearer Bonds ( Very Urgent Needed.)
Subject: [spam: 111.1] Get back to me !!!
Subject: [spam: 106.5] Get back to me !!!
Subject: [spam: 100.5] YOUR URGENT ATTENTION IS HIGHLY NEDED
Of course, if you are checking against a large number of mail boxes,
the problem becomes one of volume, for the service against whose
database the checks are being made. At a high enough volume, such
queries become abusive for the data provider. Some services offer
subscription services, such as the Spamhaus Data Query Service.
https://www.spamhaus.org/datafeed/
In this instance, database entries are synchronized to local, using
rsync, obviating the need for individual DNS queries per host.
- --
David Ritz <
dritz@mindspring.com>
Be kind to animals; kiss a shark.
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