I don't trust any e-mail provider to be honest but here are a few decent ones
Countermail Free week trial
Always read the Privacy Policy, you will be surprised(or maybe not) on what information they actually do collect from you.
]]>Email fundamentally can't really be private because of how it's designed, so a service needs to be very clear about what it does, what it doesn't do, what problems it may have, and how it works.
]]>Perhaps Hushmail. They offer a free level with 25 MB of storage.
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