Mail servers for large numbers of users
I am about to build a (group of?) e-mail server for
a large number of users... more than 65536.
Using Debian of course. :)
It should include SMTP and IMAP. Users do not need to have
login accounts.
Probably I will be using Potato.
What should I start with?
Are there good open sourced MTA and IMAP servers that do not
operate on system password accounts? (so I don't have to create
60000+ accounts)
For now I will be trying to distribute the accounts on more
than 1 server, set-up the DNS to have more than 1 MX, and
forward the mails internally through SMTP for non-existent
local users. Which MTA is good for this purpose?
For ease of configuration I may be choosing exim, because
this is what I have been using at home (it's the default MTA
for Debian.. :)
I see that exim can match user names with dbm/ldap lookups as
well.. which may prove useful.
What about qmail or postfix?
Are there other precautions that I have to take care?
Are there any other precautions?
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