On 4/7/2011 9:39 PM, jeremy.als...@imap-mail.com wrote:
[snip]
Whoa. I took a look at that and that's a bit much for me at this stage
of the came.
Do I need do it this Multi_Instace way? Even with your explanation I
still don't understand how many PostFix servers I need to install on my
one host. I really want to keep the bells and whistles to a minimum,
and just get to the point that, mail comes in, gets thrown away if it's
from one of those bots, has spam content or a virus, and if everything's
okay, gets delivered to my InBox.
I think I get what you're saying about servers, processes and hosts. So
one host is good enough. It'll have multiple processes running on it.
So how many PostFix's, or these Instances of it, do I need to install to
just get what I want to do done?
If I'm looking in the wrong places, that'd be good to know.
Thanks for your time and help.
Jeremy Alsten
Jeremy,
Let me ask one super-meta question first: if all you have is one Inbox,
why is IMAP service from, say, Gmail, or your ISP, not adequate? You can
configure your MUA (Thunderbird, Biff, Outlook...) very easily and be
off to the races enjoying Gmail's vast spam-filtering capabilities for
free. To run a server you'll need: a static IP (or dynamic IP with a
dynamic DNS provider); availability of port 25 which most ISPs block
incoming to residential service; a machine that is up and on the network
more than 99% of the time; a decent reputation for the IP that your ISP
gives you, which is unlikely if it's a residential IP; backup mail
receivers for when your server does fail; a way of being paged or e-mail
when your server is down; and other sysadmin headaches.
[Note: I am writing this as Stan's note just arrived; some of my points
are very similar and redundant.]
Anyway...I'm doing everything you describe with the exception of clamav
with a single instance. It was recommend that two instances would make
things cleaner and more extensible. I will get there as needs grow. Look
back in the archives for my name and the surrounding discussions such as
http://tech.groups.yahoo.com/group/postfix-users/message/273634
At the risk of putting out incomplete information making things worse,
here are two pieces of the puzzle I uses to filter with SpamAssassin. So
this is illustrative, not prescriptive:
This is from master.cf. What it's meant to illustrate is that all mail
that comes in on the standard SMTP port 25 (and thus public,
unencrypted, unauthenticated) is sent through a filter before taking the
next step. (I have a very simple next
smtp.example.com:smtp inet n - n - -
smtpd
-o content_filter=filter:dummy
-o syslog_name=postfix-smtp
filter unix - n n - - pipe
flags=Rq user=spam argv=/usr/local/bin/spamc -U /tmp/spamd.sock -e
/usr/sbin/sendmail
-i -f ${sender} ${recipient}
-Daniel
