Re: detect ISP's legitimate SMTP server

[James Light <jlight () srcit stevens edu>]

On Thu, Mar 03, 2011 at 11:24:15AM +0200, Martin T wrote:
> I was abroad in Germany with my Nokia n900 and I needed to send few
> emails over the HSDPA connection. The problem was, that I had no idea
> about ISP's SMTP server and the one I use in my country did not
> work(most likely ISP allows to use only the legitimate ones). I
> detected the ISP using the IP address and whois information about it
> and finally gave them a call. However, is there some sort of smart way
> to detect legitimate SMTP servers in ISP network?
>
>
> regards,
> martin
>
> ------------------------------------------------------------------------

Did you try to query DNS for the mail server?
Set the type of the request to MX.


i.e. to find the hostname of the SMTP server for 'netmeister.org':
$ dig -t MX netmeister.org
    or
$ nslookup -type=MX netmeister.org

If you have 'dig' or 'nslookup' available.


     -JL
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