Re: Web Server Using Postfix #networking

David Ranch <dranch@...>

Hello Don,

My email client will set up just fine using the local ip address for the server 192.168.1 using ports 110 and 25 ---- and there is not a problem sending and receiving emails.

Is the Raspberry Pi the email client or the email server?

However, if I use my full address,, the client will not set up. (no sending or receiving)

Are you saying that if you configure the email client to use the IP address vs. DNS name, that's the difference?  Or is the issue that one is the Internal IP address and the other is the external IP?

On the email client machine, what do the following commands give you?

   dig | grep

   dig mx | grep

I see the following:

   $ dig | grep
   ; <<>> DiG 9.8.2rc1-RedHat-9.8.2-0.68.rc1.el6_10.1 <<>>
   ;                        IN      A         3584    IN      A

   $ dig mx | grep
   ; <<>> DiG 9.8.2rc1-RedHat-9.8.2-0.68.rc1.el6_10.1 <<>> mx
   ;                        IN      MX         3600    IN      MX      5         3578    IN      A

From my AMPR station, I can ping and connect to your host on ports 25 and 110:

   $ ping
   PING ( 56(84) bytes of data.
   64 bytes from icmp_seq=1 ttl=64 time=78.7 ms
   --- ping statistics ---
   1 packets transmitted, 1 received, 0% packet loss, time 0ms
   rtt min/avg/max/mdev = 78.757/78.757/78.757/0.000 ms

   $ telnet 25
   Connected to
   Escape character is '^]'.
   220 ESMTP Postfix (Debian/GNU)

   $ telnet 110
   Connected to
   Escape character is '^]'.
   +OK Qpopper (version 4.1.0) at starting.
   telnet> close

   $ telnet 465
   Connected to
   Escape character is '^]'.
   220 ESMTP Postfix (Debian/GNU)

Can you also do those same tests to confirm you're getting DNS resolution and IP forwarding?


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