It seems that comcast.net, hydrogendiscoveries.com, and other email domains are served by servers that bounce if there is any kind of non fatal delay. What is going on? You don't bounce simply because the destination server told you to wait. Like I said though, comcast.net and a lot of other domains bounce if there is any delay for any reason.
If this is true, grey listing is out. I have been using sqlgrey and it has been at least slowing down junk email. When it is on though, I am probably delaying or stopping more legitimate email than junk. I asked if grey listing makes the spam problem worse, but that didn't generate any interest. The spammers are obviously retrying to defeat grey listing. I check the spamcop.net and dnsbl.sorbs.net blacklists, but that clearly isn't enough. Because of the way smtp is set up over the Net, it is extremely rude to reply to the random email that comes in with a go to this site and authenticate your message message. It would be terrible if I was doing that and slipped up so that the administrator of the plug list got such an email. The point of asking people to authenticate their message is that I might be able to stop random emails from email bots. I have SPF checks turned on and if I don't recognize the domain of the sender, I reject. I am at a loss. I use Postfix. Black listing every possible email address and only white listing those that I know are legit would almost certainly stop the spam, but it would make it difficult to receive email from new sources or even old sources when someone's email address changes. How do you discourage people/bots that try to send to addresses you don't support anymore? How do you get solicitors trying to sell stuff you don't want or need to leave your email box alone? If I didn't know any better, I'd say that my email address is getting harvested. Maybe someone on this list has decided to target me specifically. On the other hand, it could just be zombie computers that are virus ridden and hooked up to the Net. Would it be appropriate to fire off a reply immediately or 5xx someone who is trying to reach a mailbox I don't support? How would I go about doing that? How do I fight the spammers who are dictionary attacking me? If I continue to change the email addresses I support, I will eventually run out of choices. Varying the email address is not the answer, but I don't know what is. _______________________________________________ PLUG mailing list [email protected] http://lists.pdxlinux.org/mailman/listinfo/plug
