First let me exclaim that I absolutely hate email in my business because as a technology it is broken but the end user is mostly unaware of it.
>> block not only most spam, but also some valid emails to my customers. This result is the most time consuming frustrating to you and the customer no win scenario that can result. As a technologist is may be preferable to miss legitimate email than deal with spam but as a unschooled end user it is never acceptable to miss a legitimate email. >> Did it create a ton of follow-up work for you with clients >> screaming that they're not getting emails If by strict adherence you mean never to accept email without a proper SPF/ DKIM record then absolutely it will cost you a lot in time and reputation as the customers complain. SPF/ DKIM records are not universally used and most often if a domain has one it won't have the other. We're pretty small and our email logs run near a 700mb a day. Just looking for a missed email transaction even when the customer has the day, which they rarely know, or the email address which is often wrong, still takes a lot of time to find. So preventing any increase of false positives is preferable from a business standpoint. We use numerous methods: DNSBL, RDNS, SPF, content filters, public and private white list with automatic send to additions, Spam Assassin and other filters derived from honeypot email traps that create a spam score where we reject, mark or allow depending on the score. We do pretty well but still have false positives. The trick is in the balance. Out largest rejection rates comes from DNSBL where we use public and private lists and our most often cause of false positives come from spam assassin and SPF checks. There is no one solution to email spam. Dennis Powers UXB Internet - A website Design and Hosting Company P.O. Box 6028, Wolcott, CT 06716 - T:203-879-2844 W: http://www.uxbinternet.com W: http://www.ctbusinesslist.com ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~| Order the Adobe Coldfusion Anthology now! http://www.amazon.com/Adobe-Coldfusion-Anthology/dp/1430272155/?tag=houseoffusion Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:355353 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/groups/cf-talk/unsubscribe.cfm
