Hi,

In my testing, I may have stumbled upon a bug.

Fire up a telnet session to a server containing a hosted domain (e.g. 
foo.com)

telnet mailserver 25
HELO sendingserver
MAIL FROM: <[EMAIL PROTECTED]>
RCPT TO: <[EMAIL PROTECTED]>
  513 Relaying denied.
RCPT TO: <[EMAIL PROTECTED]>
  (after a long pause)
  550 User <nonexistant@> unknown <--- Note it ends with @>
RCPT TO: <[EMAIL PROTECTED]>
  (after a long pause>
  550 User <[EMAIL PROTECTED]> unknown <--- random non ASCII characers 
instead of [garbage]
RCPT TO: <[EMAIL PROTECTED]>
  (long pause again)
  550 User <[EMAIL PROTECTED]
QUIT
  221 Bye.


Assuming for a moment that the delay is to do with DNS (which it may be, 
my domain isn't yet fully set up), that still leaves the issue of garbage 
appearing in the response. That sounds like there might be a possible 
buffer over-run error causing a problem. Could it possibly be caused by 
large DNS MX record coming back (considerably bigger than 512 bytes, 
lots of MX-es so falls back on TCP)?

Thanks.

Gordan

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