dasoviet
asked on
SMTP Communication
Hi,
I installed several email servers but the SMTP cannot receive messages.
Let me explain how the DSL network is working here (i don't know the name of the protocol):
Login on a "LAN" which we get the NIC's IP address is something like 10.140.x.x
then login to the ISP's network to get internet access which we get our public IP address.
I pointed the dns to forward all MXE (Mail Easy) to the public IP address.
PROBLEM: the problem is that SMTP is not receiving msgs from outside the "LAN". For instance, if I send an email from my ISP I receive the msg OK. If I sent a msg from hotmail/yahoo the msg never arrives. Note that POP3 is working fine.
I tried about 10-15 mailservers but the problem is still the same. Note also that web/FTP (port:80/21) is OK with dns.
Any solution?
Thanks!
I installed several email servers but the SMTP cannot receive messages.
Let me explain how the DSL network is working here (i don't know the name of the protocol):
Login on a "LAN" which we get the NIC's IP address is something like 10.140.x.x
then login to the ISP's network to get internet access which we get our public IP address.
I pointed the dns to forward all MXE (Mail Easy) to the public IP address.
PROBLEM: the problem is that SMTP is not receiving msgs from outside the "LAN". For instance, if I send an email from my ISP I receive the msg OK. If I sent a msg from hotmail/yahoo the msg never arrives. Note that POP3 is working fine.
I tried about 10-15 mailservers but the problem is still the same. Note also that web/FTP (port:80/21) is OK with dns.
Any solution?
Thanks!
ASKER
hmmmm...
Port 25 is open.
Sounds interesting what you are saying.
Well,
From the dsl modem a cable is going to a switch. From the switch a "cable tv" is "eating" bandwidth and from another port of the switch the server / router is getting connection. As you mention above the problem could be between the server the switch and the modem.
switch is a simple 10/100 one not with routing capabilities.
Port 25 is open.
Sounds interesting what you are saying.
Well,
From the dsl modem a cable is going to a switch. From the switch a "cable tv" is "eating" bandwidth and from another port of the switch the server / router is getting connection. As you mention above the problem could be between the server the switch and the modem.
switch is a simple 10/100 one not with routing capabilities.
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SOLUTION
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if not forward port 25 from you external ip to you internal ip ....
on most dsl router this is done using the Virtual Server option??
a little more info on you set up would also help..
do you have a static public ip address??
are you using a dsl router?
you know draw us a picture?