I am sitting on the fence (I can see some merits to both sides of the argument) but I was wondering what the opinion of the sluggers out there is - would you install one and why ?
one point that no one else has mentioned and is a big problem with having a secondary mx is spam. I am my own primary mx and block various domains and IPs cos of spam. Trouble is an increasing amount of spamming software if it gets a reject from the primary mx goes on and tries all the other mx's. So unless you can control the blocklists at your secondary (and other) mx sites (which usually you can't if it's your ISP) you will still get all the spam and might as well not bother blocking anything.
I had a secondary mx for yonks until just recently when one mob of spamming bastards were spamming me once a day to my secondary mx.
So my opinion is: if you've got the option of a secondary mx (free) then use it until/unless it's too much trouble. If you don't have the option then don't worry about it. (assuming you're planning a pretty much permanent internet connection of course)
Dave.
-- SLUG - Sydney Linux User's Group - http://slug.org.au/ More Info: http://lists.slug.org.au/listinfo/slug
