Security
Google Chrome has Yahoo email site as not secure. As a 20+ year customer, it is very sad that Yahoo doesn't take security seriously.
1st
ranked

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Bonnie Thompson commented
I keep getting hit from virus. Changing to another email soon.
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Mohan Medepalli commented
It keeps happening to me too! It's so frustrating that a simple https cannot be taken care of by Yahoo. Maybe they're not interested anymore in this email business...
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Gloria commented
I agree that Yahoo email doesn't seem secure. It switches from "Secure" to "Unsecure" while I'm looking at and responding to emails. If it continues, I am changing my email service to another provider!