Simple.
1. List the mail servers of the large ISPs in your country.
2. do a dig yourispdomainnamewithoutwww mx
This will give you the mail exchange records or better known as the mail
server domain names
3. Do telnet mailserverdomainname 25
In that you may get postfix in the banner. (however some may hide the
mail server type used)
On 7/14/2011 5:28 PM, Peter Tselios wrote:
Hallo,
I need to prepare a presentation for my company because we plan to
deploy a new mail system. I need to know the names of some medium to
large ISPs that uses Postfix as their SMTP server. Do you know where I
can find that information?
Thanks
Peter
