Outbound message que without originator address

[chandrakalum]

We are running Exchange5.5 on Windows 2000 Advance server. When checking Internet Mail service properties, and &quot;Outbound message awaiting delivery&quot; in the Que menu it contains so many entries to different destinations which contains no details of the originator column.( except <> mark) We have not allow anybody to relaying and I cant understand why those entries do not display our domain as the originator address.Does that mean somebody is using our server for relay purpose?
Any idea..?

Chandra

 

[brontosaurus]

not really. most likely, it's just spam that had your correct domain name, but did not have a valid username, and as you know, almost all spam comes from bogus email addresses. so...this is exchange's way of trying to send an NDR without entering a never-ending loop. by wiping out the &quot;from&quot; address (instead of using the spammer's address as &quot;from&quot, exchange will eventually time-out on the delivery of the NDR and just drop the message completely.

 

[chandrakalum]

Thanks for the comment, & one more question.
Would this be a burden to the system or is there any way to stop this kind of spamming.

 

[Spirit]

The system will continually attampt to send these messages at the intervals set and for as long as difined in your settings.

The burden is dependant on how many there are and how often and for how long messages are configured to stay in the queue for.

Do not know a way to stop it tho'

Iain

I just delete them every 6 hours or so.