Hi, >On 6/02/21 2:23 am, Matus UHLAR - fantomas wrote: >> while I support using postscreen, I'm not sure it would be able to >> catch backscatter, becsuse backscatter often comes from servers who >> properly follow SMTP RFCs.
>The question here is whether this is really backscatter, or just spam taking >advantage of the null sender address? Sounds like it might be the latter, in >which case Postscreen may prove useful? >Nick The cases I have seen are spam campaigns with AWS and Azure Accounts. I took a look at postscreen, but not sure how to implement that on a Plesk machine. The more interesting point with this was for me, what happens when spammers use the null sender address und how far they were able to trick all my checks. Greets, Ludi
