TDC is kind of "filtering" port 25 to protect us from beeing open relays or something.
You have to do the following :
When setting up the MX-records put your own as the primary and backup-mx.post.tele.dk as secondary.
When connecting to your mail-domain other servers will get an error, and they will send it to the backup-mx-server.
The backup-mx-server will "do its things" and the look for the primary mx-server. The backup-server are permitted to send to your port 25 and thus the mail gets to the final destination.
The MX-records should look like this :
my-domain.dk MX 10 mail.my-domain.dk my-domain.dk MX 20 backup-mx.post.tele.dk
It works fine for me, only I use the standard TDC configured router, with no port 110 :-((
Well, I'm only running a test/"fooling-around"-server :-)
Hope this helps.
/Ole
Niels Poulsen wrote:
Hello chi Omega
TDC IS Blocking port 25, also are stofanet.dk, Tiscali, and a few others ISP in denmark. The found ine ISP thats dosent block or require any specials settings.. thats cyberCity.dk
U have to make som changes in the dns settings... but as i can see, u have TDC as u�r isp ... dont u have a, how to say.. the same Ip al the time ?
If u have.. change to Gratisdns.dk they are great and its easy to setup.. and FREE !!
As Daveclarke wrote, him and I have tried to find a solutions, i think i have found it, but i cant use it by the ISP im useing now, so ill wait working with it until i get the CC line..
....
----- Original Message ----- From: "Ed Brown" <[EMAIL PROTECTED]>
To: "sambar List Member" <[EMAIL PROTECTED]>
Sent: Friday, June 20, 2003 12:39 AM
Subject: [sambar] Mail server ?
Markus is not correct. Actually, when you send mail to an smtp server you are not using port 25 on your computer. You are using any available port to send but you are CONNECTING to listening port 25 at the destination. It is very common for companies to block ANY incoming connections (and, perhaps ISPs also) to prevent a rogue computer from connecting to you, while allowing you to connect OUTBOUND to any server that will accept you. Interestingly, when you are in such a situation, the router will frequently allow incoming connections to you IF you set the port command thru FTP on port 21. However, if you are connecting to an FTP server which is operating on an odd port, the router is not smart enough to allow you to port. In such cases, you must PASV so that the FTP server will allow you to retreive the file, rather than it sending to you on your own data port. With SMTP it is even more common to have port 25 blocked, so as to decrease spam thru open relays. In this case the most logical answer is that your ISP has block incoming port 25 connections to its customers to prevent inadvertant open relays. If this is the case, there is NOTHING you can do in the Sambar settings to overcome this.
----- Original Message ----- From: "Markus Maier" <[EMAIL PROTECTED]> To: "sambar List Member" <[EMAIL PROTECTED]> Sent: Thursday, June 19, 2003 5:34 AM Subject: [sambar] Mail server ?
If you can send mail (and they are recieved at the other end on some otherproviders server) it does not sound like they have port 25 blocked, since
it's used both for sending and recieving smtp... do you know if you are
behind a firewall?
On 19/Jun/2003 06:29:55, Chi Omega wrote:there
Hi, i was wondering now that my ISP (tdc) is blocking "port 25", is
any way to setup sambar so i can recive mails on MY server. Right now i can send mails, but it wont recive mails, im using "dns2go"
Anyone that can help ?
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