Cannot send mail on DSL with Netscape or Outlook Express

[Creeker]

We use Exchange Server 5.5 to handle our email on a LAN through a DSL connection. We use Outlook 2000 as our mail program. I would
like to set up Netscape to also be able to send mail through this DSL
connection, but I cannot get it to work.

I set the incoming mail to our server name and server type to
IMAP. For outgoing I entered the server name and the user name. It
reads the mail correctly and pulls in the inbox from the server. When I
try to send mail, it is returned from the system administrator as
undeliverable, saying the recipient is not recognized.

 

[joegz]

I am not familiar with your network but I would venture to guess you have the wrong server name for the outgoing server. Are you tunnelling to your network or are you able to connect to the server just going through the DSL provider? joegz
"Sometimes you just need to find out what it's not first to figure out what it is."

 

[Creeker]

I definitely have the right name to the server. We have our own internal mail server with MS Exchange and a static IP address.

I think I've solved the problem, although I don't know the possible repercussions of the change in settings. I changed the Internet Mail Service to "Reroute incoming SMTP mail (required for POP3/IMAP4 support)" which is the way it was sent when we had a POP3 account with an ISP. I guess the technician who set up the DSL must have changed it. Anyhow the mail is going out now. I hope changing this doesn't cause any more problems. We have a DSL router with firewall, Norton Antivirus, etc.

Thank you for your reply.

 

[yizhar]

HI.

You MUST go to the server once again, and put some relay restricitions on it, like allowing relay only from ip addresses in your internal network.

If you fail to do so, then in several weeks from now when a spammer will find your open SMTP relay server (and it is only a matter of time!), the server will be used by spammers to relay.

Bye
Yizhar Hurwitz

http://come.to/yizhar

http://teachers.sivan.co.il/yizhar

 

[Creeker]

Yizhar, I did restriction routing to "Hosts and Clients that successfully authenticate".

How do I restrict to only internal? I tried just using the "Hosts and clients connecting to these internal addresses" and entering the internal IP addresses, but that didn't work. The message I received was that relay was restricted. I would love to just restrict to internal relay if I could figure out how.

Is restricting to only those who authenicate enough protection?