[CentOS] SPAM on the List

[Always Learning]

On Sun, 2011-07-17 at 23:15 +0200, Alexander Dalloz wrote:


> The 2nd one in your list:
> 
> Organisation:    British Telecommunications, EU
> HELO / EHLO:     smtpe1.intersmtp.com
> HELO IP:         62.239.224.89
> MX IP:           62.239.224.234
> MX DNS A record: smtp61.intersmtp.com
> 
> Here smtpe1.intersmtp.com resolves properly forward and reverse, if that
> is what counts for you.

BUT the IP address used for the mail server was, as the list shows,
62.239.224.234 which, at the time, had a host name of
smtp61.intersmtp.com

smtpe1.intersmtp.com still does NOT properly resolve.

host smtpe1.intersmtp.com
smtpe1.intersmtp.com has address 62.239.224.89

host 62.239.224.89
89.224.239.62.in-addr.arpa domain name pointer smtpe1.intersmtp.COM.

*almost* correct. In Linux, like Unix and the pre-Microsoft days,
uppercase letters have a different numerical value to lowercase letters.

Uppercase 'COM' is definitely not the same as lowercase 'com'.

No wonder some call 'BT' Balls-up Telecoms.

Do your Mail Transfer Agents use valid or bogus HELO/EHLO names ?

-- 
With best regards,

Paul.
England,
EU.