I really don't know if this is apposite to the preceding discussions but - For ages now I have been getting quantities of "Dictionary Attack" e'mails where I and sometimes one other person on the list of recipients has been a genuine "Spamvigator" user.
Previously, I just "cut & pasted" the full message from MailWasher Pro's viewing of the e'mail right at the server, and forwarded it to the seemingly p1ss useless people at "Spamvigator".
In recent times, together with my complaint, I have also attempted to send the same message to all the other "Dictionary Attacked" users on the original e'mail that got to my e'mail box.
On only TWO occasions have I "seen" that two e'mail addresses at "Spamvigator" were valid - and both of them were allegedly "over quota" and the e'mail returned as being undeliverable solely 'cos the apparently genuine e'mail box wasn't being cleared.
I have re-submitted all the Netvigator "false email addresses" notification back to Spamvigator - and asked them why the hell they weren't taking any action against e'mail bulked out with false e'mail addresses generated by "Dictionary Attack" - Needless to say - the Wowsers never, ever reply !