Problem Sending Mail With Postfix
Sahil Tandon
sahil at tandon.net
Tue May 20 04:07:29 UTC 2008
* Sahil Tandon <sahil at tandon.net> [05-19-2008]:
> * Paul Schmehl <pauls at utdallas.edu> [05-19-2008]:
>
> > Macintosh:~ pauls$ telnet my.mywebsite.com 25
> > Trying 209.181.247.105...
> > Connected to nullmx.mywebsite.com.
> > Escape character is '^]'.
> > 220 nullmx SMTP
> > EHLO testing.mydomain.com
> > 220 Hello
> > quit
> > 220 Buh-bye!
> > Connection closed by foreign host
> >
> > Why "nullmx.mywebsite.com"? Which resolves to an entirely different IP
> > address.
>
> Perhaps the admin routes all port 25 traffic to nullmx.
Actually, I am wrong here. This is happening on your machine because you are
using telnet on OS X Leopard:
http://chip-miller.net/2008/03/14/solving-a-dns-mystery-on-os-x/
Try telnet from a FreeBSD (or any other) machine, and you will get:
# telnet my.mywebsite.com 25
Trying 208.87.33.150...
telnet: connect to address 208.87.33.150: Connection refused
telnet: Unable to connect to remote host
--
Sahil Tandon <sahil at tandon.net>
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