Outlook 2003 and DoS

  • Thread starter Thread starter Anteaus
  • Start date Start date
A

Anteaus

Had a situation yesterday where a SMTP mailserver was being DoS'd by a
client.

Culprit was an Outlook 2003 desktop, which was trying to send a number of
oversize attachments.

The mailserver has an attachment-size limit set, and quota on the mailbox,and
it seems that Outlook does not recognise this situation, but instead keeps
hammering the server with a continuous series of send attempts.

I'm not hopeful of any fix, but just thought I'd mention it.
 
What error code does the server give outlook when it refuses to accept the
message? Does the server NDR the oversized message? An error code should
stop the current attempt - and if it generates an NDR, all future attempts.
But if the server doesn't tell outlook (or the user in the form of a
warning email) how is either to know its too large?

(There won't be "a fix" to outlook.)









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