[ILUG] e-mail server

[Kenn Humborg]

> <Are you sure you want to use POP download the mail?  If you want
> <that to work properly, you'll need to have one POP account at the
> <ISP for each user on your system.  You'll also need some way to
> <maintain all the passwords for these accounts. 
> <     
> <Better to use UUCP (or whatever system your ISP uses for this kind
> <of setup).  
> 
>    We all know Kenn's love of UUCP... 8-)
> 
>    I'm nearly certain fetchmail can do this: get mail from various
>    pop servers and send them to the correct user file in /var/spool/mail

OK.  Repeat after me:

1. The envelope sender is not necessarily the same as the Sender:
   or From: header.

2. The envelope recipient is not necessarily the same as the
   To: or CC: headers (e.g. when using a BCC).

3. Multi-drop fetchmail requires the mail to be _delivered_ to 
   a mailbox.

4. Delivery removes the envelope information.

If you use single-drop fetchmail, then you need to have one
POP account at the ISP for each local user.  This isn't so
much of a cost problem anymore (because of the free ISPs) 
but it's still going to be tricky.  

You'll have to convert user1 at school.ie to something like
school-user1 at isp.ie on outgoing mail.  Then you'll have
to tell all your users that they have two different email
addresses (one internal and one external).

It's just plain ugly and is the wrong solution to the 
problem.

Later,
Kenn