[TUHS] off-topic list

Grant Taylor gtaylor at tnetconsulting.net
Tue Jun 26 05:35:23 AEST 2018

On 06/25/2018 11:37 AM, Clem Cole wrote:
> Ah ... Makes sense.  MMDF was possibly my favorite Unix MTA.

Hum.  I have no experience with MMDF.  Perhaps I should play.

> We shipped it as Masscomp's default Mail System for a longtime.

I never knew that MMDF was used anywhere other than SCO Unix.  (I don't 
know which SCO product.)

According to Wikipedia PMDF was used on VMS.  Now I wonder if there's 
any relation to PMDF and what I've frequently heard referred to a Mail-11.

> It was only after I left that they broken down and switched to sendmail 
> to be like Sun and much of the rest of the internet.

The Wikipedia article also indicates that PMDF became Sun Java System 
Messaging Server.  Which seems to counter Clem's comment.

Or, perhaps as typical for Sun, there are multiple solutions to the same 
""problem.  Ship Sendmail with the base OS but sell a larger product 
that (hypothetically) does a super set of functions.

> any MTA on the internet had to be hardenned.  I'm sure MMDF could be 
> attacked with stack overwrites and strcpy(3) style attacks because when 
> Crocker wrote it, that was not what was being considered.

Thankfully you don't have to put an MTA directly on the internet to be 
able to play with it.  It's trivial to put an MTA behind a smart host 
that that shields the (potentially) vulnerable MTA from the brunt of the 

Grant. . . .
unix || die

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