Thank you Wietse, You spurred me to look at the logs and take a closer look. The problem was an old whitelist entry from when we were in the ISP business. Removing the entry solved my problem.
Mike On Tuesday, March 04, 2014 12:34:50 Wietse Venema wrote: > Mike McGinn: > > I ma getting some backscatter problems lately. > > If you are receiving backscatter mail, then filtering on client > properties won't do much good, because in this case the clients are > real mail servers not spambots. > > Instead, reject mail for non-existent recipients if possible, and > try to do some content filtering as outlined in > http://www.postfix.org/BACKSCATTER_README.html > > If the backscatter is affecting a specific recipient, then there > may be no other option than to reply 450 to all requests except > those from clients that he/she has exchanged email with in the past. > > Before writing down examples it is good to know what the problem is. > > Wietse > -- Mike McGinn KD2CNU Ex Uno Plurima No electrons were harmed in sending this message, some were inconvenienced. ** Registered Linux User 377849
