On Tue, 30 Jul 2002, Brian Ashe wrote:

> Hello Aly,
> Tuesday, July 30, 2002, 9:16:11 PM, you textually orated:
> 
> <snip>
> 
> OK. This message is just filled with misstatements, opinions and factual
> errors. Let's clarify things...

I'm glad you jumped in before I did. I might have had to show him the
output of ls mail in my home directory. 
 
> AD> As I also mentioned that Sendmail is a system that makes use of
> AD> the mbx format which is pretty unreliable, one big file that 
> AD> has all you mail, if that gets corrupted kiss most of you mail 
> AD> good-bye.
 
> Sendmail has NOTHING to do with mbx, maildirs or whatever you want to use.
> Sendmail is an MTA. That's a Mail Transfer Agent. All it does is get mail
> from server to server. If it has happened to arrive at the right one, then
> it passes it off to an MDA. The default MDA in RH is procmail.

Which can do almost anything you want with it. In my case it delivers 
it to 20 or 30 incoming folders. If it is something I consider 
important, it can be delivered to a back up folder in addition to its 
normal destination.
 
> Also, mbx is a simple text file. Corrupting it is only likely if you suffer
> a power outage. If you are suffering power outages on servers then they are
> either not critical servers or you are not planning properly. Fixing it can
> be done in your favorite text editor. (Note, there are other ways to corrupt
> it, but they are very unlikely and would also apply to maildirs.)

And even if it is corrupted, chances are good that you will only lose 
one message. (Worst case you might have to edit some junk out of 
the file because some mail readers can't deal with it.)

> AD> So working with the fact that Sendmail doesn't support Maildirs 
> AD> and you want to use mbx formats and Sendmail then by all means 
> AD> work with UW-imapd/pop3d its reliable. That is your solution. 
> AD> Qpopper is indeed a good pop3 server.

There have been questions about the security of the UW imapd/pop3d
package. But at least in my experience, it has been the easiest to 
integrate with outside features. Pop before smtp is easily 
implemented, it works well with most web mail apps, etc.

> If you want to use maildir with UW-IMAP, then read their page on how
> to do it. You will simply need to recompile and then change your
> procmail rules to deliver to maildirs.

Always a good idea to read the developers info for any program you 
use-especially on a server.
  
> AD> If you decided that you want to use a more reliable mailbox 
> AD> format such as Maildirs then firstly do some research on
> AD> Maildirs, choose a better product than sendmail, such as 
> AD> Exim, Qmail or Postfix and then find a imap/pop server that 
> AD> supports maildirs such as Courier-Imap.

<snip> 
> I have nothing against any of your alternate suggestions (well, that's not
> completely true, I dislike Qmail for DJB and his licensing but not for the
> product), but they are not "superior". They may fit someone's needs better,
> but there is not necessarily something to gain (well, except for a product
> that suits your needs :).

I agree about DJB. I'm also not particularly fond of Exim (mostly 
because of experience from a user's standpoint, but it left a bad 
taste in my mouth. It seems to me that there is a "flavor of the week" 
for mail servers. All the rest of them come and go, but sendmail is 
always there. The learning curve for sendmail may be a bit higher, but 
you are also more likely to be able to create just about any kind of 
configuration you want or need. 

> Best advice is do a lot of reading.

Always the best advice. 

-ray



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