> Sometimes the smtp greeting will give an indication, when you telnet > into it. Of course, their outbound server isn't necessarily the same > host as the one accepting inbound connections. The bigger the domain, > the more likely these will be different. > > >
Forgot to mention that I tried that also but it did not really help much: $ telnet ip_add 25 Trying 67.231.153.94... Connected to anonymised_hostname Escape character is '^]'. 220 mx0b-00123c01.pphosted.com ESMTP m0008250
