[Assp-test] Does ASSP generate a 550 response?

[Michelle D. <md...@oc...>]

Does ASSP ever generate 550 responses to foreign mail systems sending in mail?  Or only the mail host behind ASSP?   (I have exchange 2007 sitting behind ASSP in case it matters)

The reason I'm asking is that I see the occasional 550's in my ASSP log as shown below.  I've disguised the domain and username in the log below, but they are valid, and on my domain.  Other mail to this same user usually comes in fine.

Can someone tell me the source of this 550 ?  This is really messing up upstream MTA's and I need to stop this behaviour quickly.

THANKS!


Dec-23-13 11:03:07 m1-14587-30487 [Worker_1] 64.182.103.22 <me...@fp...<mailto:me...@fp...>> info: found message size announcement: 25.96 kBy
Dec-23-13 11:03:07 m1-14587-30487 [Worker_1] 64.182.103.22 <me...@fp...<mailto:me...@fp...>> [SMTP Error] 550 mailbox for <myu...@my...<mailto:myu...@my...>> is
Dec-23-13 11:03:07 m1-14587-30487 [Worker_1] [PersonalBlack] 64.182.103.22 <me...@fp...<mailto:me...@fp...>> to: myu...@my...<mailto:myu...@my...> [spam found] (