jayesh shinde: > Hi , > > Is there any alternative , how to stop if spammer / virus infected > machine start sending such emails. > Due to this outlook's "On Behalf of" option , one of our end user > created the noise. This option makes confusion , when the end > recipient receive the emails and reply it. > > I came to know in exchange this can be control from server side. > > How the other experts are handling this kind of issue from server side. > I am searching the option by which postfix will allow SMTP relay only > if auth id + From: + Sender: are same.
Rate limit your mail clients, so that they cannot send large amounts of email when they become infected. Then, you have less cleaning up to do. http://www.postfwd.org/ http://www.policyd.org/ Wietse
