Another MX question

Brad Knowles brad.knowles at skynet.be
Tue May 22 17:15:00 UTC 2001


At 5:55 PM +0200 5/22/01, Enrik wrote:

>  if mail1 is online he catch all the emails for mydomain.edu.
>  If it is down than the emails go to mail2.mydomain.edu.
>  It's True? ( I DONT KNOW....)

	Most mail servers will probably act this way, yes.

>  Well if it's true why mail2 catch some mail for mydomain.edu
>  if mail1 is online?

	Because mail1 may have been temporarily overloaded, or 
unreachable by some systems.  In addition, there are some 
spam-generation tools that *ALWAYS* transmit their effluent to the 
secondary MX, under the assumption that it is less secure than the 
primary, and may be able to sneak in through the "back door".

-- 
Brad Knowles, <brad.knowles at skynet.be>

/*        efdtt.c  Author:  Charles M. Hannum <root at ihack.net>          */
/*       Represented as 1045 digit prime number by Phil Carmody         */
/*     Prime as DNS cname chain by Roy Arends and Walter Belgers        */
/*                                                                      */
/*     Usage is:  cat title-key scrambled.vob | efdtt >clear.vob        */
/*   where title-key = "153 2 8 105 225" or other similar 5-byte key    */

dig decss.friet.org|perl -ne'if(/^x/){s/[x.]//g;print pack(H124,$_)}'


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