Thank you Chris. Maybe too soon to block all sg3.yahoo.com but in logs I
only see spam and I wasn't sure, is this a dynamic range for DSL
connectivity? Or does Yahoo originate legitimate mail thru here, I hoped
someone knew more about Yahoo to give an insight.
On 2019-05-23 17:46, Chris Woods
_spf.mail.yahoo.com SPF record validates any IP with a PTR within yahoo.com
or yahoo.net. Unless someone's spoofing rDNS it's from one of their MTAs.
https://secure.fraudmarc.com/tool/spf/_spf.mail.yahoo.com
Googling around, other example records:
tm13.bullet.mail.sg3.yahoo.com (old result, no lon
In logs I see a large amount spam from servers like
sonic303-21.consmr.mail.sg3.yahoo.com
..this looks like it could be a home DSL location but before I ban all
of sg3.yahoo.com I would like to ask, where does valid Yahoo mail come
from?
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mailop
