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That is odd. Wonder if the two accounts, although both Yahoo, reside in two different data centers with different anti-spam rules in place?I have three email accounts - my gmail account for work, a yahoo account for e-newsletters and online buying and another yahoo account for all the ads (harbour freight/ home depot) that I get every day.
Weirdly one of the yahoo accounts is superb at catching spam - the other not so much (and regularly sends 'real' emails to spam) - I still can't sort out why sonce you would presume the same filters from the same company.
Hey Guest!

icloud.com (just made that up)