Hello, All- sorry if this is a little off-topic, but I can’t think of a more knowledgeable group to ask. In the 20+ years that I’ve owned a couple of business and personal domains, they’ve periodically been “hijacked” and used to generate spam. I noticed this because either (a) people told me they were getting spam from me or (b) SpamSieve would actually catch it if it was mailed to me at the same address.
I recently started looking into putting SPF and/or DKIM DNS records into my domains (hosted by 1and1 and namecheap, respectively, which are also my mail hosts). I’ve tried tools like spfwizard.com to generate the SPF records, then used another tester to validate them, and it appears that I have the syntax right and I have them in the right record (TXT). But I have to be honest and admit I really don’t know what I’m doing in this case (I’m not exactly a n00b but have never come close to reading these RFCs).
So, my questions: is this worth doing? Does it help in the “global war on spam”? How can I find out if it’s even working? Can it break something (like my business email)?
At the very least I was hoping that using SPF or DKIM would make their spam filters tag any spam that appeared to originate from me. Does SpamSieve use this data? Or is it used in the server rather than by the mail client? Or am I way off base going this route?
Any feedback (positive and/or brutally honest) would be much appreciated! Thanks!