Quinn Comendant wrote:
Is it not possible to monitor different IP addresses, both on port 25?
Then I could change the MX records for mail delivered to the "Sendmail
IP" to the "Qmail IP"?
What about setting up Qmail to answer on port 2525 (or whatever) then
configure Sendmail to forward all mail to localhost:2525?
Or use iptables to route mail from one IP on port 25 to localhost:2525?
Or use Procmail on a domain-by-domain basis to directly inject messages
to Qmail?
I do have access to a second server, but don't want to use it for mail.
But I could migrate all Sendmail users to that server, then migrate
all users back after installing QT on the current server. (Yikes, two
steps back, one forward!)
Or, since the second server is an identical OS, installing QT there,
doing full testing and ensuring everything works and is tuned the way I
want it. Then turn off Sendmail on my current server, install QT using
the
same process, copy the configuration over from the second server,
migrate
all users and mail, then just "turn it on." This assumes the new QT
install
will work as well on the current server as the second server. If it
doesn't work I can re-enable Sendmail and start over (possibly losing
some
messages).
I'm less concerned with POP/IMAP. Do you think I should expect any
errors with courier as a drop-in replacement for Dovecot? It worked on
the first try for me during my original testing.
Or, what about continuing to use Dovecot? Has anyone used QT with
Dovecot? It seems to be a pretty good/light-weight software.
There are ways. Patch/modify the source for Toaster. this will cover
your first 3 suggestions. Toaster by default (unless you modify the
source) gloams on the first IP it sees, and I believe answers all of
them. Meaning it'll send on the first IP, but receive on all.
You could shut down the smtp daemon, and configure sendmail to inject
the messages using qmail-inject. Some scripting involved there. I've
never used sendmail, so I can't even begin to tell you where to start.
Similar thing with procmail.
Firewall rules won't work unless you modify the qmail source. If you're
going to get that far into it, you probably don't want our pre-cooked,
rounded corner version of the QMail install. What we distribute here is
a turn-key system. We usually don't modify the source for special
circumstances - mainly just for updates and new versions of supported
OSes. A few of us do some work on the side, but not for free. What you
get for free is what you see. Sorry.
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