100K is a lot, sounds like you are a local TV station which I doubt. For legit email marketing/mass mailing FBL is mandatory. Unsubscribe button must be easy to use and must work. Process and remove bounces. It appears you have none of these features.
Never bother a recipient second time, after he/she used spam or unsubscribe button. On the other hand, if your list contains certain patterns – (I’m not willing to share) – your list was purchased or harvested in which case you are ok in spamhaus. From: owner-postfix-us...@postfix.org [mailto:owner-postfix-us...@postfix.org] On Behalf Of Zalezny Niezalezny Sent: Monday, June 1, 2015 10:09 PM To: Postfix users Subject: spamhaus - reasons of ban IP 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
