Any suggestions for a MTA for a new admin?

[Tom Norris]

I have finally made the jump from paying people to host my websites to 
doing it myself (setting up apache, perl, php, postgresql, and all that 
fun stuff.)  Now I want to migrate my e-mail addresses over to a FreeBSD 
4.11 machine that lives in a data center.  Can any of you recommend a 
good MTA (and maybe a book) for someone that knows relatively few things 
about the big scary world of e-mail transport?

Just to throw it out there, one of the things I need to do is to have 
the MTA route mail for a few different domains that are pointed towards 
the machine on different ip addresses.  Is that possible?


Thanks,
Tom Norris