You could simply perform a whois query for the IP address.
A whois from samspade gives me
Quote:
202.43.219.172 = [ web8510.mail.in.yahoo.com ]
inetnum: 202.43.192.0 - 202.43.223.255
netname: YAHOO-ASIA-1
descr: Internet Content Crovider
country: US
admin-c: YI12-AP
tech-c: YI12-AP
status: ALLOCATED PORTABLE
mnt-by: APNIC-HM
mnt-lower: MAINT-AP-YAHOO-INC
remarks: -----------------------------
remarks: This object can only be modified by APNIC hostmaster
remarks: If you wish to modify this object details please
remarks: send email to hostmaster@apnic.net
with your organisation
remarks: account name in the subject line.
remarks: -----------------------------
changed: hm-changed@apnic.net
http://samspade.org/t/lookat?a=202.43.219.172
As you can see it belongs to yahoo.What kind of emails are you getting from them?
Can you paste the message[email] headers of the emails you are recieving?
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