Hi All,
I would like to ask You what could be a reason of ban in Spamhaus. Today morning we have got message from our client that our system is not able to send E-mails. In did, system IP has been putted to black list. I have reviewed all logs and didnt found any good reason. System with Postfix which we are using to distribute an E-mails to our clients for some reason has been blocked. This is massmailer system. Till now, we havent got any problems with, we have simply send 100k E-mails and everything was fine. TIll today. >From Spamhause we have got feedback that "it could be: virus, malware, spam content etc.etc." but nothing was described in detail, what is exacly the reason. In the Postfix log I have found a lot of 550 Errors. 550 Uknown user local... In this case I suspect that system bounced a lot of messages. Is this a reason ? Also in the header of the message, I found an E-mail address which is not exist. Some kind of reply E-mail, which simply not existing. Maybe this is the reason ? Would be great if somebody could support me here. Or maybe somebody will be so kind and tell me how to trace this kind of problems. Seriously I dont know how to find a reason of ban. Maybe Postfix will have some kind of debugging mode etc.etc. Thank You in advance for Your support! Zalezny
