I've seen this a couple times before, usually only happens with 
bounced mail. From my understanding the receiving machine isn't 
totally RFC compliant, Qmail when it bounces a mail uses the 
>From address of something like </\.\/> or some other crazy 
address, the receiving server is supposed to accept that but some 
odd NT mailservers don't, such as imail I think it is.
 There isn't a standard for Receipt notification. Most true inet 
mailers won't support Delivery Notification, others such as 
Exchange only support it internally if the sending client is Outlook 
and the receiving client is Outlook and the message hasn't left the 
server to the internet. Read Notification is a function of the Mail 
Reader, some do it some don't.

Philip Wall

On 19 Jun 01, at 1:28, Daniel Hardaker wrote:

> Ive been in a long discussion with Virgin Internet about one of their
> mail servers not accepting mail with the bounce message below. 
> 
> Im sending this hoping im not missing anything and the fault is not with
> vpopmail as the address is sent as an alias (from mysql table).  So,
> from the error below is there any possibility that vpopmail is rewriting
> the addresses or headers or something incorrectly?
> 
> Im sure it isnt, the receiving server is Intermail which I have had
> similar problems with relaying to before.  Any help would be
> appreciated!
> 
> (And also, a user is asking me why my mail server doesnt support
> delivery receipts?  Im assuming they are something made up by microsoft
> that qmail doesnt use?)
> 
> Hi. This is the qmail-send program at <server>.
> I tried to deliver a bounce message to this address, but the bounce
> bounced!
> 
> <[EMAIL PROTECTED]>:
> 206.29.192.146 does not like recipient.
> Remote host said: 553 Request not completed, mailbox name not allowed
> Giving up on 206.29.192.146.
> 


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