Use your internal DNS server. For example, if you have 192.168.10.5 and 192.168.10.7 operating as your DNS servers on your network, then set those as your SmartDNSHost servers.
Without port 53 (UDP and TCP) access from the mail server, you *cannot* use an external DNS from that machine. At 08:19 12/17/2003, Gustavo Pereira - Loyer wrote: >I tried to set the SmartDNSHost option in Server.tab, but it still does not >work. > >Which external DNS could I use? > >Regards, > >Gustavo > > >----- Original Message ----- >From: "Tracy" <[EMAIL PROTECTED]> >To: <[EMAIL PROTECTED]> >Sent: Wednesday, December 17, 2003 11:06 AM >Subject: [xmail] Re: Can't send any mail using XMail in Linux > > > > If you successfully connected to the machine using telnet from the mail > > server, then the mail server should be able to do the same. > > You said that you have port 53 blocked. You also said that you are not > > using SmartDNS (if I recall correctly). So, how are you doing DNS lookups? > > > > I could be wrong here, but what I'm about to say matches my own experience > > - Xmail uses external DNS (such as the root DNS servers) to find MX >records > > for remote systems. So, for example, if Xmail wanted to find the MX record > > for uol.com.br, it might: > > > > 1) Do a query to the ROOT servers for the authoritative DNS server that > > serves uol.com.br > > 2) Do a query to the authoritative DNS server for uol.com.br's MX record > > > > Setting up the SmartDns option in server.tab causes Xmail to use a >specific > > (set of) DNS server(s) to perform these queries. > > > > So, if you have no access to port 53 (UDP and TCP) from the mail server, > > you need to establish the SmartDns option in server.tab. > > > > And if I'm wrong here, somebody beat me with a cluestick, OK? > > > > At 07:44 12/17/2003, Gustavo Pereira - Loyer wrote: > > > > >Leonardo, > > > > > > I successfully made a telnet into mx.uol.com.br 25, and work exactly >how > > >you said. The DNS is working fine, because I can make a telnet on port 25 > > >for other mail servers too. > > > > > > I think the problem is that uol.com.br and other servers made some >kind > > >of verification/authentication that I'm not aware of. > > > > > >Regards, > > > > > >Gustavo > > > > > > > > > > > >----- Original Message ----- > > >From: "Leonardo Cabral" <[EMAIL PROTECTED]> > > >To: <[EMAIL PROTECTED]> > > >Sent: Wednesday, December 17, 2003 10:25 AM > > >Subject: [xmail] Re: Can't send any mail using XMail in Linux > > > > > > > > > > Gustavo Pereira - Loyer <[EMAIL PROTECTED]> wrote: > > > > > Davide, > > > > > > > > > > The XMail machine only respond requsets in ports 25 and 80 TCP. > > > > > All other ports are blocked by the firewall. Why is the port 53 used > > > > > for? > > > > > > > > > That's ok, the question was if your machine has DNS resolution enabled >(by > > >a > > > > firewall). But you already said that yes, in a previous mail. > > > > >I can ping uol.com.br from mail server, and I'm not using >SmartDNSHost > > > > option is Server.tab. > > > > > > > > So, I suggest you to try to do a telnet to an outside smtp server >and > > > > see if you have outbound access to deliver mail. Log into your server >as > > > > root and type: > > > > telnet mx.uol.com.br 25 > > > > And see if you get something like: > > > > Trying 200.221.11.51... > > > > Connected to mx.uol.com.br. > > > > Escape character is '^]'. > > > > 220 storm16.uol.com.br ESMTP > > > > > > > > If you don't, send the error here and that may help. > > > > Regards, > > > > > > > > Leonardo > > > > > > > > - > > > > To unsubscribe from this list: send the line "unsubscribe xmail" in > > > > the body of a message to [EMAIL PROTECTED] > > > > For general help: send the line "help" in the body of a message to > > > > [EMAIL PROTECTED] > > > > > > > > > > > > > >- > > >To unsubscribe from this list: send the line "unsubscribe xmail" in > > >the body of a message to [EMAIL PROTECTED] > > >For general help: send the line "help" in the body of a message to > > >[EMAIL PROTECTED] > > > > > > - > > To unsubscribe from this list: send the line "unsubscribe xmail" in > > the body of a message to [EMAIL PROTECTED] > > For general help: send the line "help" in the body of a message to > > [EMAIL PROTECTED] > > > > > >- >To unsubscribe from this list: send the line "unsubscribe xmail" in >the body of a message to [EMAIL PROTECTED] >For general help: send the line "help" in the body of a message to >[EMAIL PROTECTED] - To unsubscribe from this list: send the line "unsubscribe xmail" in the body of a message to [EMAIL PROTECTED] For general help: send the line "help" in the body of a message to [EMAIL PROTECTED]
