Actually a quite good solution is to use someone else's MX, then use 
pop3, imap, or uucp to get your mail from them to your local MX, which 
you can run any mailer you wish, I've done this for quite a while using 
fetchmail, exim, spamassassin, cyrus imap, and squirrelmail
fetchmail grabs the mail via pop3 from your isp, exim runs it through 
spamassassin then pushes it into the mailbox/maildirs cyrus serves em up 
to squirrelmail. or squirrel can alternativly be setup to use local 
mailboxes now i belive.
squirrel also has many plugins that make it way more than simple webmail.
I suggest anyone having MX problems try this out. just be sure of your 
setup by running some messages to the local MX and checking you get them 
through ok. I lost about 4 emails when setting up my stuff due to 
misconfiguring exim. setting up fetchmail is the last step in the 
process. your local smtp server should be the first. then imap & 
squirrel, spamassassin last

Jochen Kunz wrote:

>On Thu, 15 Jul 2004 18:11:29 +0200
>Jan-Benedict Glaw <jbglaw@lug-owl.de> wrote:
>  
>
>>Don't be your own MX then, but let it deliver to a "real" MX and post
>>messages by sending them to your ISP's relay. That's IMHO The Right
>>Thing (TM).
>>    
>>
>In theory yes. But in practice some of the "real MX" hosts are brain
>dead as they e.g. don't allow ssh shell login to the mail host for
>reading mail via elm(1), pine(1), mutt(1), ... or what ever. If you are
>"in luck" you have some web mail thing, that is unusable with anything
>else then InternetExploder...
>
>No thank you, I want to be root on my primary MX.
>
>It is time for IPv6 to get rid of the limited IPv4 address space. Enough
>fixed addesses for everyone. ;-)
>  
>