If you are listed on spamhaus there will be a page about it normally on their site, they have a few blacklists and some are worse than others, so either check the response codes from postfix to see if that tells you the what was listed. Also, if you know for certain that you are listed by them, you should have seen the listing page, most commonly it's a SBL (against the ip) or DBL (against the domain). There's also others like ZEN which combines a couple of other lists for viruses, hacked servers, etc.
Look up and find a listing before going too far in to spamhaus: https://www.spamhaus.org/lookup/ If you are listed, you or your ip provider have to request removal, and they will tell you why it was listed and what to do. On Mon, Jun 1, 2015 at 3:09 PM, Zalezny Niezalezny <zalezny.niezale...@gmail.com> wrote: > 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
