Ubuntu mail headers are not best practice

[Sherman Boyd]

The default postfix configuration sets the mail header to something like this:

220 mx.myhostname.com ESMTP Postfix (Ubuntu)

This gives anyone who connects to port 25 both the name of your SMTP
software and your Linux distribution.  There is no reason to disclose
this information, and from a security perspective it is a best
practice not to.

I suggest that regardless of which SMTP software is installed the
Ubuntu default header should look like this:

220 mx.myhostname.com ESMTP

This is a best practice that all the big players seem to follow;
gmail, yahoo mail, etc.


-- 
Best regards,

Sherman Boyd

TwoCell Computer Consulting
http://www.twocell.com