I am trying to consolidate multiple mail servers w/ assort MTAs to one established mail serverr with Courier-MTA. Moving mail from mbox format went beautifully with mb2mb, but now I have run into a stumper.

Since most of the machines I am conslidating were small user run systems, there were a number of cases where bad usernames were chosen - joe, john ect. As I consolidate it looks like there will be a number of overlapping usernames. The main server has a good username policy, but I want to be able to switch over mail delivery with minimal interrruption and without my users having to send out a warning to all their contacts that their email has changed, so I need to be able to re-reoute jo...@domain0.com to jsmi...@primemail.ex.com and jo...@domain2.com to jjon...@primemail.ex.com

I think the solution is to use maildrop with a filter but it looks like a pretty steep learning curve on the maildrop filter scripting language.

Has any one run into a similar situation?

I thouht that it would be as simple as doing a .mailfilter that looked like this:

if ( /^To: john@old.domain/) { to "/home/jsmith/Maildir" }

But when I test it as a .mailfilter in a testing account it appears that since the user doesn't have write access to the other users Maildir it just deffers delivery. (tried it with both suid and guid for maildrop)

I don't want to put it in maildroprc till i'm sure all is working correctly for fear that I could mess up ALL my delivery ;)

Is there an easy way to bounce or otherwise redirect the mail?

something like

to | mail jsmith@localhost

but I'm just not sure.

Thanks for any suggestions! Just trying to avoid re-inventing the wheel.