[horde] anti-spam solution for Horde ?
nd at syndicat.com
Mon Feb 15 16:58:35 UTC 2010
On Monday 15 February 2010 17:41:16 Spyros Tsiolis wrote:
> Does anyone have any idea what anti-spam solution should I use
> for Horde ?
> Do I understand correctly when I say that I've read somewhere Horde
> takes care of it ? Is it true ? Is it fiction ?
from my experience i can say that "anti-spam" solutions within the email
client are not very effective nor useful. The most effective spam fight is
possible on the receiving SMTP (MX) - at smtp time - which typically has the
most informations and options to check the sender.
There are a few very good anti-spam solutions in case you are able to fiddle
with your SMTP / MDA/LDA configurations. A "good" solutions should consists
- a good security configuration for your SMTP (i.e. relaying, sender
- usage of DNSBL / RBLs
- usage of content / header based solutions like spamassassin / spamd
If you (or your users) are some of that which prefers to have a "spam" folder
where highly "spam-rated" emails are placed you may mark your emails with a
spam core (i.e. by spamassassin) and use a (i.e. sieve) filter for all users
to filter out high ranked mails into a subfolder like "spam".
But many users see no help within such a solution, because they have to watch
two folders instead of one to make shure to get all important emails.
There is no general howto for successfully fighting spam without any false
positives - if the results from DNS blocking lists and spamassassin are not
enough from your viewpoint you have to dig deeper into SMTP and to develope
your own set or chain of solutions.
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