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Let me preface this with a big THANK YOU; Hopefully somebody here will be able to help me out--
How should I go about setting up a defense for mass mail bombs that are coming against me and mine? The associated email address and domain names are spoofed. The IP address might be as well and I don't ahve time right ow to cross check their listings for a suspected location that would illustrate a not-so-shocking origin point...??(it wouldn't surprise me to find out that somebody from a specific location would be trying to do this to me and mine)
Can somebody suggest a setup that will filter out these pains-in-my-a$$?
Which MTA are you using ?
Are the domain names valid ?
Does the sender address exist ?
If you are using Postfix you should reject email from non-existant domains. And in that case you could do a sender address check for the domains that are commonly spoofed ... don't do a sender address verification for all domains though since this is a resource intensive task!