Re: Worried - Need Advice!
- From: "cjobes" <cjobes@xxxxxxxxxxxxx>
- Date: Sun, 29 Oct 2006 10:16:56 -0500
You are on the right track and with SBS it's not difficult to do. It would
be helpful to know which version of SBS you are running 2000/2003
standard/premium, 1 NIC 2NICs, ISA installed etc.
But no matter which one you are running, the main preperation is with your
ISP or who manages the authoritative DNS for your domain. If you don't have
direct access to that DNS server (a lot of the larger ISPs provide that
access), you need to find out the following:
Are they blocking Port 25 on their perimeter and if so, which direction (in,
out, or both). I don't know of any ISP that blocks 25 into their network.
Most ISPs that sell static IPs are able to exclude those for the outgoing
block. If that's not the case with your ISP you can ask them about using
their mailserver as a smart host. There are also services available where
you can get around the block on 25 and use a different port. Let's not go
there until you get the facts.
After the port 25 issue is cleared up, do the following:
Create or have you ISP create
A record mail.yourdomain.com that points to your public IP on the server (or
router and forward to server)
MX record that points to mail.yourdomain.com with a value of 10
PTR record for mail.yourdomain.com
If your ISP offers a "cache all server" have them enter a second MX record
with a value of 20 that points to their cache server.
It would also be advisable to create an SPF record which identifies your
mailserver as the authorized server to send mail for your domain. That
protects you from spamers using your domain as a fake sender.
When these records are in place, run the CEICW and switch from POP3 to SMTP.
You might want to get back to here and post the answers before you actually
do it.
Claus
"Jonas Persson" <JonasPersson@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:D943FABA-3B22-455B-81B1-E3CAC045A9AB@xxxxxxxxxxxxxxxx
I have aproduction server in a rather large environment. We fetch mail via
POP3 and send via the ISPs smtp server. Obviously we receive e-mail every
15
minutes. Now people want to receive mail immediatley and POP3 is not
reliable. I want to change this so that the serve accepts smtp mail and
would
like your advice. My thinking is:
1. Ask ISP to add a MX record for our server (which has a fixed IP adress)
2. Ask ISP to send all mail to the domain cybetina.se to that server
3. In small business server - delete POP3 connector and do nothing?
Please help with bullet 3,4,5 etc if you have the time
Many thanks
/Jonas
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