[Mailman-Users] MTA only for Mailman

[Ivan Fetch]

Hello,


    I'd like to have an MTA who's only purpose is to accept SMTP 
connections for Mailman mailing lists and spawn the appropriate Mailman 
binary.  This MTA will be fed emails from our Sun Internet Mail Server 
(IMS) 5.2 cluster.

    We are moving away from having IMS 5.2 pipe to a wrapper, which intern 
spawns the proper Mailman binary, because of an issue with patching 
breaking the IMS pipe channel (omitting the longer story behind this). 
The thought now is that IMS will deliver mail destined for a mailing list 
to another "mailhost" which is running this MTA which will spawn to 
Mailman.  The "Mailman MTA" is just another Ip on the same nodes - 
although it is introducing an extra hop in delivery to mailing lists, it 
factors out the Sun / IMS issue we find outself stuck in...


    Is anyone using a light weight MTA to just hand emails off to Mailman 
and deny anything else?

    I'm looking at Sun Sendmail (I know, it's definitely not light weight) 
to do this, simply because it's already on the boxes in question - I'm 
still sorting out how to get Sendmail to deliver to aliases, but not local 
accounts.


Thanks for any feedback on MTAs, or a more sensable way to accomplish 
this.

- Ivan Fetch.