[Lula] Mail server ip changed issue.

[Titu Kim]

Alan, Jeff, Cheeto,
       Thanks for all your valuable information. These
are very impoortant information for me to start
planning my project.

Have a nice long weekend.

Kim TITU

--- Jeff Carlson <jeff at ultimateevil.org> wrote:

> Alan Ptak wrote:
> > I'm also a firm believer in secondary DNS and
> backup MX services on 
> > different networks for availability purposes, and
> use both as standard 
> > practice. For under $50/year, it's cheap
> insurance.
> 
> I've seen this debate before.  In the end, I decided
> that a secondary MX 
> wasn't really worth the trouble it causes.  Every
> plus it provides seems 
> to be negated by something else.
> 
> First of all, properly configured mail servers
> queue.  I think most 
> servers are set by default to five days.  If the
> message isn't delivered 
> by then, it bounces back to the sender.  If the
> message is picked up by 
> a secondary MX, but doesn't make it to the final
> destination, there's a 
> greater possibility of the bounce not making it back
> to the sender.  Not 
> that a secondary is somehow less reliable, but it's
> a longer path back 
> to the origin, and we are talking about a situation
> where something has 
> gone wrong already.
> 
> Second, I have seen secondary MXes used to
> circumvent filtering.  Since 
> the secondary would logically be white listed,
> spammers sometimes send 
> directly to the secondary to avoid filtering in
> place on the primary. 
> This is even more of a problem if you don't control
> the secondary, as 
> you are proposing here.
> 
> Third, if you do control the secondary, then it's
> another box exposed to 
> the Internet that you have to worry about.  Spammers
> will try to relay 
> through it, you'll need to keep it updated, etc. 
> Sure you would take 
> care of it anyway, but it's another consumer of your
> resources.  Do you 
> need that?
> 
> Email was originally designed with the idea that its
> delivery was 
> unreliable.  Queuing is part of the equation for
> this reason.  Sure, so 
> is a secondary MX.  This is just the view I have
> taken on the situation.
> _______________________________________________
> Lula mailing list
> Lula at lula.org
> http://www.lula.org/mailman/listinfo/lula
> 


__________________________________________________
Do You Yahoo!?
Tired of spam?  Yahoo! Mail has the best spam protection around 
http://mail.yahoo.com 
_______________________________________________
Lula mailing list
Lula at lula.org
http://www.lula.org/mailman/listinfo/lula