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Please don't lie just to plug your favorite tech, it does nasty things
to your credibility.
SPF is designed to prevent and reveal forgeries, most spam relies on
forgery to hide the identities of the spammers. SPF can and does help
both in the filtering of spam and in mitigation of joe-jobs against
third parties not involved in the spam.
Spam can comply with SPF, but that makes the spammers easier to track
down by law enforcement. Since most of the things I see being sold using
spam are illegal in many jurisdictions, this increases the risk of
selling those goods/services through spam.
Therefore, by fighting forgery, we fight spam. Not all spam is
vulnerable to this, but 419's, pyramid schemes, bogus drugs, phishing,
and prostitution are all susceptible.
Chris Drake wrote:
| N> So to make effective use of SPF I really need to have my own mail
| N> server, which means moving to dsl on a fixed ip.
|
| Running a mail server on DSL might not be a good idea - if your DSL is
| DUL or RBL listed (most are) you'll find some stuff you send won't
| reach the recipients.
|
| N> My problem is this:- We are getting 6,000 to 9,000 emails per day
99.?%
| N> spam. At present these get filtered quite effectively with SA. This
will
| N> get worse before it gets better. If I can't get most of these filtered
| N> out at isp level what should be my best course of action?, if I don't
| N> change my email address.
|
| SPF is *NOT* an anti-spam technology.
|
| It will not have ANY NOTICEABLE IMPACT on your spam problem EVER.
|
| Have you looked at CR technology? Purists hate it because some
| bounced spams end up hitting the forged senders addresses, however, it
| does eradicate 100% of your spam without any danger that you'll ever
| miss and email due to a false positive. Places like mailblocks.com
| might be worth checking out. You've just got to figure out how much
| money your 9000 spams are costing you, and whether or not their fee is
| worth it of course.
|
| N> Nigel
|
|
| N> ________________________________________________________________
|
| N> Kilner Vacuumation Co. Ltd. http://www.kilner-vacuum-lifting.com
| N> Tel. +44 1246 416441 Fax. +44 1246 290573
| N> ________________________________________________________________
|
| N> Scanned for viruses by F-Prot Antivirus - http://www.f-prot.com
|
| N> All information contained in this email is confidential and may
| N> be used by the intended recipient only.
|
| N> -------
| N> Sender Policy Framework: http://spf.pobox.com/
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|
| -------
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- --
Daniel Taylor VP Operations Vocal Laboratories, Inc.
dtaylor(_at_)vocalabs(_dot_)com http://www.vocalabs.com/
(952)941-6580x203
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