Re: POP3/IMAP RPM wanted

[Adam Tauno Williams <adam@xxxxxxxxxxxxxxxx>]

> I'm not sure what to install on my Red Hat server for a POP3 and
> possibly IMAP server.
> I have a fair number of virtual domains all pointing to the same
> IP number, but I've set up sendmail so that jamie@allofthem.com pipes
> into "jamie"'s mail.  I don't need anything fancier than that.
>

Why not use the imap daemon that comes with Redhat?  It's in the pop3 RPM.  But
something else might be faster if you have alot of users.  Do you have NFS
mounted mail spool or is all this on one machine?  What version of sendmail?

> 1. cyrus-imapd-1.6.19-2.i386.rpm
> Looks like it writes a lot of files, including a sendmail .mc file.
> I don't speak m4 or mc or whatever it is very well.  But I'll do
> this if it's best.

Does this use the "maildir" mail box format or the "mh". Supposedly "maildir" is
more scalable as each message is it's own file and their is an index file, vs.
mh where you have to seq. scan a mailbox every time you want a particular
message, and re-write the whole file (basically) every time some one deletes a
message.  Haven't used this one yet, but intend to switch to it.  IMAP/POP only
has to do with the client MUA getting messages,  sending messages is entirely up
to the server MTA (sendmail).  m4 is used to create config files for sendmail. 
If you sendmail is working now for local users it should require little if any
change to handle remote users (you have to let them relay messages through you).

>
> 2. gnu-pop3d-0.9.8-2.src.rpm
> Looks simpler but the docs look iffy...and it's a "contrib" I think
> not an actual RedHat-approved RPM.

Never head of this one.

> 3. something else?

The imapd that comes with Redhat.

>I've heard IMAP is not very secure (in fact I recall hearing that at a
>KLUG meeting).  Due to protocol or implementations, I don't know.
>Should I be concerned?

IMAP is just as insecure as POP.  Everything is clear text, chat/expect kind of
communication.   You can telnet to a POP or IMAP server's port and if you know
the commands read you mail directly.  There are several SSL or SSH
encryption/tunneling solutions.  It all depends on how secure your intermediate
links are.

Systems and Network Administrator
Morrison Industries
1825 Monroe Ave NW.
Grand Rapids, MI. 49505