So, I checked the destination email address and I found this n...@none.com. I guess it becomes pretty obvious, now, why this mailbox is busy. BTW... there was only one attempt to send to this destination.
On Sun, Sep 1, 2013 at 7:21 PM, Viktor Dukhovni <postfix-us...@dukhovni.org> wrote: > On Sun, Sep 01, 2013 at 04:12:28PM -0400, Roman Gelfand wrote: > >> host ALT2.ASPMX.L.GOOGLE.com[74.125.136.27] said: 450-4.2.1 The user >> you are trying to contact is receiving mail at a rate that 450-4.2.1 >> prevents additional messages from being delivered > > The user is receiving too much mail, there is no indication that > you're sending the (majority of the) offending mail, so often the > problem is not your fault. If you have a mail loop generating a lot > of mail for the user in question then the issue is yours. Check your > logs. > > -- > Viktor.
