[Mailman-Users] Messages held in shunt and retry queue

[Brad Knowles]

At 11:30 PM -0400 2004-06-07, Brian York wrote:

>  Would their be any performance loss by having mailman send through the ip
>  address of eth0 instead of the loopback?

	Using eth0 instead of lo0 will result in real packets being 
generated and sent out the interface, and then coming back in.  This 
could run foul of firewall rules, network stack configuration, DNS 
configuration issues, etc....  Using eth0 would also be less 
portable, and if you were to move the lists to another machine, you'd 
have to make more configuration changes to get them working again -- 
as opposed to putting a numeric 127.0.0.1 in your configuration 
instead.

	Generally speaking, if you can help it, you want to use lo0.

	Using eth0 instead won't necessarily hurt your performance on a 
medium or small-size list (it could hurt on a big list, depending on 
what other traffic the machine is doing), but it could potentially 
result in a lot of other problems that may be difficult to debug, 
etc....

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

"They that can give up essential liberty to obtain a little temporary
safety deserve neither liberty nor safety."
     -Benjamin Franklin, Historical Review of Pennsylvania.

   SAGE member since 1995.  See <http://www.sage.org/> for more info.